diff --git a/internal/contracts/intent.go b/internal/contracts/intent.go index 6e2107f8..d4ea04ba 100644 --- a/internal/contracts/intent.go +++ b/internal/contracts/intent.go @@ -76,20 +76,20 @@ type IntentDeclaration struct { // IntentValidationError represents intent validation failures type IntentValidationError struct { - Code string `json:"code"` // Error code for programmatic handling - Message string `json:"message"` // Human-readable error message - Details map[string]interface{} `json:"details" swaggertype:"object"` // Additional context + Code string `json:"code"` // Error code for programmatic handling + Message string `json:"message"` // Human-readable error message + Details map[string]interface{} `json:"details" swaggertype:"object"` // Additional context } // Error codes for intent validation const ( - IntentErrorCodeMissing = "MISSING_INTENT" + IntentErrorCodeMissing = "MISSING_INTENT" IntentErrorCodeMissingOperationType = "MISSING_OPERATION_TYPE" IntentErrorCodeInvalidOperationType = "INVALID_OPERATION_TYPE" - IntentErrorCodeMismatch = "INTENT_MISMATCH" - IntentErrorCodeServerMismatch = "SERVER_MISMATCH" - IntentErrorCodeInvalidSensitivity = "INVALID_SENSITIVITY" - IntentErrorCodeReasonTooLong = "REASON_TOO_LONG" + IntentErrorCodeMismatch = "INTENT_MISMATCH" + IntentErrorCodeServerMismatch = "SERVER_MISMATCH" + IntentErrorCodeInvalidSensitivity = "INVALID_SENSITIVITY" + IntentErrorCodeReasonTooLong = "REASON_TOO_LONG" ) // Error implements the error interface @@ -115,8 +115,8 @@ func (i *IntentDeclaration) Validate() *IntentValidationError { IntentErrorCodeInvalidSensitivity, fmt.Sprintf("Invalid intent.data_sensitivity '%s': must be public, internal, private, or unknown", i.DataSensitivity), map[string]interface{}{ - "provided": i.DataSensitivity, - "valid_values": ValidDataSensitivities, + "provided": i.DataSensitivity, + "valid_values": ValidDataSensitivities, }, ) } @@ -227,6 +227,36 @@ func DeriveCallWith(annotations *config.ToolAnnotations) string { return ToolVariantRead } +// Content trust constants for open-world hint scanning (Spec 035) +const ( + // ContentTrustUntrusted marks tool output as untrusted (open-world tool, data from external sources) + ContentTrustUntrusted = "untrusted" + // ContentTrustTrusted marks tool output as trusted (closed-world tool, data from controlled sources) + ContentTrustTrusted = "trusted" +) + +// IsOpenWorldTool checks whether a tool's annotations indicate it operates in an +// open-world context (fetching data from external/untrusted sources). Per the MCP spec, +// openWorldHint defaults to true when nil or when annotations are nil entirely. +func IsOpenWorldTool(annotations *config.ToolAnnotations) bool { + if annotations == nil { + return true // spec default: openWorldHint=true + } + if annotations.OpenWorldHint == nil { + return true // nil defaults to true per spec + } + return *annotations.OpenWorldHint +} + +// ContentTrustForTool returns the content trust level based on tool annotations. +// Open-world tools return "untrusted", closed-world tools return "trusted". +func ContentTrustForTool(annotations *config.ToolAnnotations) string { + if IsOpenWorldTool(annotations) { + return ContentTrustUntrusted + } + return ContentTrustTrusted +} + // isValidDataSensitivity checks if the data sensitivity is valid func isValidDataSensitivity(sensitivity string) bool { for _, valid := range ValidDataSensitivities { diff --git a/internal/contracts/intent_test.go b/internal/contracts/intent_test.go index e2297d3f..49be9049 100644 --- a/internal/contracts/intent_test.go +++ b/internal/contracts/intent_test.go @@ -6,6 +6,112 @@ import ( "github.com/smart-mcp-proxy/mcpproxy-go/internal/config" ) +func TestIsOpenWorldTool(t *testing.T) { + trueVal := true + falseVal := false + + tests := []struct { + name string + annotations *config.ToolAnnotations + want bool + }{ + { + name: "nil annotations - defaults to true (open world)", + annotations: nil, + want: true, + }, + { + name: "empty annotations (no hints set) - defaults to true", + annotations: &config.ToolAnnotations{}, + want: true, + }, + { + name: "openWorldHint nil - defaults to true", + annotations: &config.ToolAnnotations{ + ReadOnlyHint: &trueVal, // other hint set but not openWorldHint + }, + want: true, + }, + { + name: "openWorldHint explicitly true", + annotations: &config.ToolAnnotations{ + OpenWorldHint: &trueVal, + }, + want: true, + }, + { + name: "openWorldHint explicitly false", + annotations: &config.ToolAnnotations{ + OpenWorldHint: &falseVal, + }, + want: false, + }, + { + name: "openWorldHint false with other hints", + annotations: &config.ToolAnnotations{ + OpenWorldHint: &falseVal, + ReadOnlyHint: &trueVal, + DestructiveHint: &falseVal, + }, + want: false, + }, + } + + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got := IsOpenWorldTool(tt.annotations) + if got != tt.want { + t.Errorf("IsOpenWorldTool() = %v, want %v", got, tt.want) + } + }) + } +} + +func TestContentTrustForTool(t *testing.T) { + trueVal := true + falseVal := false + + tests := []struct { + name string + annotations *config.ToolAnnotations + want string + }{ + { + name: "nil annotations - untrusted", + annotations: nil, + want: ContentTrustUntrusted, + }, + { + name: "empty annotations - untrusted", + annotations: &config.ToolAnnotations{}, + want: ContentTrustUntrusted, + }, + { + name: "openWorldHint true - untrusted", + annotations: &config.ToolAnnotations{ + OpenWorldHint: &trueVal, + }, + want: ContentTrustUntrusted, + }, + { + name: "openWorldHint false - trusted", + annotations: &config.ToolAnnotations{ + OpenWorldHint: &falseVal, + }, + want: ContentTrustTrusted, + }, + } + + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got := ContentTrustForTool(tt.annotations) + if got != tt.want { + t.Errorf("ContentTrustForTool() = %v, want %v", got, tt.want) + } + }) + } +} + func TestIntentDeclaration_Validate(t *testing.T) { // Note: Validate() only checks optional fields (data_sensitivity, reason) // operation_type is inferred from tool variant, not validated here @@ -99,12 +205,12 @@ func TestIntentDeclaration_ValidateForToolVariant(t *testing.T) { // Note: ValidateForToolVariant now SETS operation_type from tool variant (inference) // It no longer validates that operation_type matches - it always overwrites with inferred value tests := []struct { - name string - intent IntentDeclaration - toolVariant string - wantErr bool - wantErrCode string - wantOpType string // expected operation_type after call + name string + intent IntentDeclaration + toolVariant string + wantErr bool + wantErrCode string + wantOpType string // expected operation_type after call }{ { name: "empty intent with call_tool_read - sets operation_type", diff --git a/internal/httpapi/annotation_coverage_test.go b/internal/httpapi/annotation_coverage_test.go new file mode 100644 index 00000000..300593a5 --- /dev/null +++ b/internal/httpapi/annotation_coverage_test.go @@ -0,0 +1,213 @@ +package httpapi + +import ( + "encoding/json" + "net/http" + "net/http/httptest" + "testing" + + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + "go.uber.org/zap/zaptest" + + "github.com/smart-mcp-proxy/mcpproxy-go/internal/config" +) + +// annotationCoverageController extends MockServerController with customizable tool responses +type annotationCoverageController struct { + MockServerController + allServers []map[string]interface{} + serverTools map[string][]map[string]interface{} +} + +func (m *annotationCoverageController) GetAllServers() ([]map[string]interface{}, error) { + return m.allServers, nil +} + +func (m *annotationCoverageController) GetServerTools(serverName string) ([]map[string]interface{}, error) { + tools, ok := m.serverTools[serverName] + if !ok { + return []map[string]interface{}{}, nil + } + return tools, nil +} + +func TestHandleAnnotationCoverage(t *testing.T) { + logger := zaptest.NewLogger(t).Sugar() + + ctrl := &annotationCoverageController{ + allServers: []map[string]interface{}{ + {"name": "github-server"}, + {"name": "slack-server"}, + }, + serverTools: map[string][]map[string]interface{}{ + "github-server": { + { + "name": "create_issue", + "description": "Create a GitHub issue", + "annotations": &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(false), + DestructiveHint: boolPtr(false), + }, + }, + { + "name": "list_repos", + "description": "List repositories", + "annotations": &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + }, + }, + { + "name": "get_user", + "description": "Get user info", + // No annotations + }, + }, + "slack-server": { + { + "name": "send_message", + "description": "Send a Slack message", + "annotations": &config.ToolAnnotations{ + DestructiveHint: boolPtr(false), + OpenWorldHint: boolPtr(true), + }, + }, + { + "name": "list_channels", + "description": "List channels", + // No annotations + }, + }, + }, + } + + srv := NewServer(ctrl, logger, nil) + + req := httptest.NewRequest("GET", "/api/v1/annotations/coverage", nil) + // Add API key bypass by setting request source to socket (trusted) + req.Header.Set("X-Request-Source", "socket") + w := httptest.NewRecorder() + + srv.router.ServeHTTP(w, req) + + require.Equal(t, http.StatusOK, w.Code) + + var resp map[string]interface{} + err := json.Unmarshal(w.Body.Bytes(), &resp) + require.NoError(t, err) + + data, ok := resp["data"].(map[string]interface{}) + require.True(t, ok, "expected data field in response") + + // Total: 5 tools, 3 annotated (create_issue, list_repos, send_message) + assert.Equal(t, float64(5), data["total_tools"]) + assert.Equal(t, float64(3), data["annotated_tools"]) + assert.Equal(t, float64(60), data["coverage_percent"]) + + servers, ok := data["servers"].([]interface{}) + require.True(t, ok) + assert.Len(t, servers, 2) + + // Find each server in the response (order may vary) + serverMap := make(map[string]map[string]interface{}) + for _, s := range servers { + srv := s.(map[string]interface{}) + serverMap[srv["name"].(string)] = srv + } + + github := serverMap["github-server"] + require.NotNil(t, github) + assert.Equal(t, float64(3), github["total_tools"]) + assert.Equal(t, float64(2), github["annotated_tools"]) + // 2/3 = 66.66... rounded to 66.67 + assert.InDelta(t, 66.67, github["coverage_percent"], 0.01) + + slack := serverMap["slack-server"] + require.NotNil(t, slack) + assert.Equal(t, float64(2), slack["total_tools"]) + assert.Equal(t, float64(1), slack["annotated_tools"]) + assert.Equal(t, float64(50), slack["coverage_percent"]) +} + +func TestAnnotationCoverage_EmptyServers(t *testing.T) { + logger := zaptest.NewLogger(t).Sugar() + + ctrl := &annotationCoverageController{ + allServers: []map[string]interface{}{}, + serverTools: map[string][]map[string]interface{}{}, + } + + srv := NewServer(ctrl, logger, nil) + + req := httptest.NewRequest("GET", "/api/v1/annotations/coverage", nil) + req.Header.Set("X-Request-Source", "socket") + w := httptest.NewRecorder() + + srv.router.ServeHTTP(w, req) + + require.Equal(t, http.StatusOK, w.Code) + + var resp map[string]interface{} + err := json.Unmarshal(w.Body.Bytes(), &resp) + require.NoError(t, err) + + data, ok := resp["data"].(map[string]interface{}) + require.True(t, ok) + + assert.Equal(t, float64(0), data["total_tools"]) + assert.Equal(t, float64(0), data["annotated_tools"]) + assert.Equal(t, float64(0), data["coverage_percent"]) + + servers, ok := data["servers"].([]interface{}) + require.True(t, ok) + assert.Len(t, servers, 0) +} + +func TestAnnotationCoverage_TitleOnlyNotCounted(t *testing.T) { + // A tool with only Title set (no hint booleans) should NOT count as annotated + logger := zaptest.NewLogger(t).Sugar() + + ctrl := &annotationCoverageController{ + allServers: []map[string]interface{}{ + {"name": "test-server"}, + }, + serverTools: map[string][]map[string]interface{}{ + "test-server": { + { + "name": "tool_with_title_only", + "description": "Has annotations but only title", + "annotations": &config.ToolAnnotations{ + Title: "My Tool", + }, + }, + { + "name": "tool_with_hints", + "description": "Has actual hint annotations", + "annotations": &config.ToolAnnotations{ + Title: "Another Tool", + ReadOnlyHint: boolPtr(true), + }, + }, + }, + }, + } + + srv := NewServer(ctrl, logger, nil) + + req := httptest.NewRequest("GET", "/api/v1/annotations/coverage", nil) + req.Header.Set("X-Request-Source", "socket") + w := httptest.NewRecorder() + + srv.router.ServeHTTP(w, req) + + require.Equal(t, http.StatusOK, w.Code) + + var resp map[string]interface{} + err := json.Unmarshal(w.Body.Bytes(), &resp) + require.NoError(t, err) + + data := resp["data"].(map[string]interface{}) + assert.Equal(t, float64(2), data["total_tools"]) + assert.Equal(t, float64(1), data["annotated_tools"]) + assert.Equal(t, float64(50), data["coverage_percent"]) +} diff --git a/internal/httpapi/server.go b/internal/httpapi/server.go index c3150d45..ed94997f 100644 --- a/internal/httpapi/server.go +++ b/internal/httpapi/server.go @@ -5,6 +5,7 @@ import ( "encoding/json" "errors" "fmt" + "math" "net/http" "strconv" "strings" @@ -534,6 +535,9 @@ func (s *Server) setupRoutes() { r.Get("/activity/export", s.handleExportActivity) r.Get("/activity/{id}", s.handleGetActivityDetail) + // Annotation coverage (Spec 035) + r.Get("/annotations/coverage", s.handleAnnotationCoverage) + // Agent token management (Spec 028) r.Route("/tokens", func(r chi.Router) { r.Post("/", s.handleCreateToken) @@ -3380,3 +3384,104 @@ func (s *Server) handleExportToolDescriptions(w http.ResponseWriter, r *http.Req "count": len(exports), }) } + +// handleAnnotationCoverage godoc +// @Summary Get annotation coverage report +// @Description Reports how many upstream tools have MCP annotations vs don't, broken down by server +// @Tags annotations +// @Produce json +// @Security ApiKeyAuth +// @Security ApiKeyQuery +// @Success 200 {object} contracts.SuccessResponse "Annotation coverage report" +// @Router /api/v1/annotations/coverage [get] +func (s *Server) handleAnnotationCoverage(w http.ResponseWriter, r *http.Request) { + type serverCoverage struct { + Name string `json:"name"` + TotalTools int `json:"total_tools"` + AnnotatedTools int `json:"annotated_tools"` + CoveragePercent float64 `json:"coverage_percent"` + } + + type coverageResponse struct { + TotalTools int `json:"total_tools"` + AnnotatedTools int `json:"annotated_tools"` + CoveragePercent float64 `json:"coverage_percent"` + Servers []serverCoverage `json:"servers"` + } + + allServers, err := s.controller.GetAllServers() + if err != nil { + s.writeError(w, r, http.StatusInternalServerError, "Failed to get servers") + return + } + + resp := coverageResponse{ + Servers: make([]serverCoverage, 0, len(allServers)), + } + + for _, srv := range allServers { + name, _ := srv["name"].(string) + if name == "" { + continue + } + + tools, err := s.controller.GetServerTools(name) + if err != nil { + // Skip servers whose tools can't be retrieved (disconnected, etc.) + continue + } + + sc := serverCoverage{ + Name: name, + TotalTools: len(tools), + } + + for _, tool := range tools { + if hasAnnotationHints(tool) { + sc.AnnotatedTools++ + } + } + + if sc.TotalTools > 0 { + sc.CoveragePercent = math.Round(float64(sc.AnnotatedTools)/float64(sc.TotalTools)*10000) / 100 + } + + resp.TotalTools += sc.TotalTools + resp.AnnotatedTools += sc.AnnotatedTools + resp.Servers = append(resp.Servers, sc) + } + + if resp.TotalTools > 0 { + resp.CoveragePercent = math.Round(float64(resp.AnnotatedTools)/float64(resp.TotalTools)*10000) / 100 + } + + s.writeSuccess(w, resp) +} + +// hasAnnotationHints checks if a tool map has meaningful annotation hints. +// A tool is considered "annotated" if its Annotations is non-nil AND at least +// one of ReadOnlyHint, DestructiveHint, IdempotentHint, OpenWorldHint is set. +// Title alone does not count as a meaningful annotation. +func hasAnnotationHints(tool map[string]interface{}) bool { + ann, ok := tool["annotations"] + if !ok || ann == nil { + return false + } + + // Check if it's a *config.ToolAnnotations (direct from stateview) + if ta, ok := ann.(*config.ToolAnnotations); ok { + return ta.ReadOnlyHint != nil || ta.DestructiveHint != nil || + ta.IdempotentHint != nil || ta.OpenWorldHint != nil + } + + // Fallback: check as map (e.g., from JSON round-trip) + if m, ok := ann.(map[string]interface{}); ok { + for _, key := range []string{"readOnlyHint", "destructiveHint", "idempotentHint", "openWorldHint"} { + if v, exists := m[key]; exists && v != nil { + return true + } + } + } + + return false +} diff --git a/internal/runtime/activity_service.go b/internal/runtime/activity_service.go index 000ed991..7477d5eb 100644 --- a/internal/runtime/activity_service.go +++ b/internal/runtime/activity_service.go @@ -227,6 +227,8 @@ func (s *ActivityService) handleToolCallCompleted(evt Event) { // Extract intent metadata if present (Spec 018) toolVariant := getStringPayload(evt.Payload, "tool_variant") intent := getMapPayload(evt.Payload, "intent") + // Extract content trust metadata if present (Spec 035) + contentTrust := getStringPayload(evt.Payload, "content_trust") // Default source to "mcp" if not specified (backwards compatibility) activitySource := storage.ActivitySourceMCP if source != "" { @@ -235,7 +237,7 @@ func (s *ActivityService) handleToolCallCompleted(evt Event) { // Build metadata with intent information if present var metadata map[string]interface{} - if toolVariant != "" || intent != nil { + if toolVariant != "" || intent != nil || contentTrust != "" { metadata = make(map[string]interface{}) if toolVariant != "" { metadata["tool_variant"] = toolVariant @@ -243,6 +245,10 @@ func (s *ActivityService) handleToolCallCompleted(evt Event) { if intent != nil { metadata["intent"] = intent } + // Spec 035: Tag activity with content trust level based on openWorldHint + if contentTrust != "" { + metadata["content_trust"] = contentTrust + } } record := &storage.ActivityRecord{ @@ -447,6 +453,9 @@ func (s *ActivityService) handleInternalToolCall(evt Event) { } } + // Extract content trust metadata if present (Spec 035) + contentTrust := getStringPayload(evt.Payload, "content_trust") + metadata := map[string]interface{}{ "internal_tool_name": internalToolName, } @@ -462,6 +471,10 @@ func (s *ActivityService) handleInternalToolCall(evt Event) { if intent != nil { metadata["intent"] = intent } + // Spec 035: Tag activity with content trust level based on openWorldHint + if contentTrust != "" { + metadata["content_trust"] = contentTrust + } record := &storage.ActivityRecord{ Type: storage.ActivityTypeInternalToolCall, diff --git a/internal/runtime/activity_service_test.go b/internal/runtime/activity_service_test.go index a6572224..425ea28f 100644 --- a/internal/runtime/activity_service_test.go +++ b/internal/runtime/activity_service_test.go @@ -642,6 +642,129 @@ func TestHandleInternalToolCall_UserIdentityExtraction(t *testing.T) { assert.Equal(t, "retrieve_tools", record.ToolName) } +// TestHandleToolCallCompleted_ContentTrust verifies that content_trust metadata +// is extracted from the event payload and stored in the activity record's metadata (Spec 035). +func TestHandleToolCallCompleted_ContentTrust(t *testing.T) { + tests := []struct { + name string + contentTrust string + wantInMeta bool + wantValue string + }{ + { + name: "untrusted content (open-world tool)", + contentTrust: "untrusted", + wantInMeta: true, + wantValue: "untrusted", + }, + { + name: "trusted content (closed-world tool)", + contentTrust: "trusted", + wantInMeta: true, + wantValue: "trusted", + }, + { + name: "empty content trust (not set)", + contentTrust: "", + wantInMeta: false, + }, + } + + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + store, cleanup := setupTestStorage(t) + defer cleanup() + + logger := zap.NewNop() + svc := NewActivityService(store, logger) + + payload := map[string]any{ + "server_name": "github", + "tool_name": "search_code", + "session_id": "sess-ct", + "request_id": "req-ct", + "source": "mcp", + "status": "success", + "duration_ms": int64(200), + "tool_variant": "call_tool_read", + "response": `{"results": []}`, + } + if tt.contentTrust != "" { + payload["content_trust"] = tt.contentTrust + } + + evt := Event{ + Type: EventTypeActivityToolCallCompleted, + Timestamp: time.Now().UTC(), + Payload: payload, + } + + svc.handleEvent(evt) + + records, _, err := store.ListActivities(storage.DefaultActivityFilter()) + require.NoError(t, err) + require.Len(t, records, 1) + + record := records[0] + if tt.wantInMeta { + require.NotNil(t, record.Metadata, "Metadata should not be nil when content_trust is set") + ct, ok := record.Metadata["content_trust"] + assert.True(t, ok, "content_trust should be present in metadata") + assert.Equal(t, tt.wantValue, ct, "content_trust value mismatch") + } else { + // When content_trust is empty, metadata may still exist (from tool_variant) + if record.Metadata != nil { + _, ok := record.Metadata["content_trust"] + assert.False(t, ok, "content_trust should not be in metadata when not set") + } + } + }) + } +} + +// TestHandleInternalToolCall_ContentTrust verifies that content_trust metadata +// is extracted from internal tool call events and stored in metadata (Spec 035). +func TestHandleInternalToolCall_ContentTrust(t *testing.T) { + store, cleanup := setupTestStorage(t) + defer cleanup() + + logger := zap.NewNop() + svc := NewActivityService(store, logger) + + evt := Event{ + Type: EventTypeActivityInternalToolCall, + Timestamp: time.Now().UTC(), + Payload: map[string]any{ + "internal_tool_name": "code_execution", + "session_id": "sess-ce", + "request_id": "req-ce", + "status": "success", + "error_message": "", + "duration_ms": int64(500), + "content_trust": "untrusted", + "arguments": map[string]interface{}{ + "code": "call_tool('github', 'search_code', {q: 'test'})", + "language": "javascript", + }, + "response": "ok", + }, + } + + svc.handleEvent(evt) + + filter := storage.DefaultActivityFilter() + filter.ExcludeCallToolSuccess = false + records, _, err := store.ListActivities(filter) + require.NoError(t, err) + require.Len(t, records, 1) + + record := records[0] + require.NotNil(t, record.Metadata, "Metadata should not be nil") + ct, ok := record.Metadata["content_trust"] + assert.True(t, ok, "content_trust should be present in metadata") + assert.Equal(t, "untrusted", ct, "content_trust should be untrusted for code_execution calling open-world tools") +} + // TestHandleInternalToolCall_NoUserIdentity verifies internal tool calls without user identity work. func TestHandleInternalToolCall_NoUserIdentity(t *testing.T) { store, cleanup := setupTestStorage(t) diff --git a/internal/runtime/event_bus.go b/internal/runtime/event_bus.go index 0d6e4066..59c48a73 100644 --- a/internal/runtime/event_bus.go +++ b/internal/runtime/event_bus.go @@ -105,7 +105,7 @@ func (r *Runtime) EmitActivityToolCallStarted(serverName, toolName, sessionID, r // arguments is the input parameters passed to the tool call // toolVariant is the MCP tool variant used (call_tool_read/write/destructive) - optional // intent is the intent declaration metadata - optional -func (r *Runtime) EmitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, source, status, errorMsg string, durationMs int64, arguments map[string]interface{}, response string, responseTruncated bool, toolVariant string, intent map[string]interface{}) { +func (r *Runtime) EmitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, source, status, errorMsg string, durationMs int64, arguments map[string]interface{}, response string, responseTruncated bool, toolVariant string, intent map[string]interface{}, contentTrust string) { payload := map[string]any{ "server_name": serverName, "tool_name": toolName, @@ -129,6 +129,10 @@ func (r *Runtime) EmitActivityToolCallCompleted(serverName, toolName, sessionID, if intent != nil { payload["intent"] = intent } + // Add content trust metadata if provided (Spec 035) + if contentTrust != "" { + payload["content_trust"] = contentTrust + } r.publishEvent(newEvent(EventTypeActivityToolCallCompleted, payload)) } @@ -211,6 +215,42 @@ func (r *Runtime) EmitActivityInternalToolCall(internalToolName, targetServer, t r.publishEvent(newEvent(EventTypeActivityInternalToolCall, payload)) } +// EmitActivityInternalToolCallWithContentTrust is like EmitActivityInternalToolCall but also +// includes content trust metadata (Spec 035) for open-world hint scanning. +func (r *Runtime) EmitActivityInternalToolCallWithContentTrust(internalToolName, targetServer, targetTool, toolVariant, sessionID, requestID, status, errorMsg string, durationMs int64, arguments map[string]interface{}, response interface{}, intent map[string]interface{}, contentTrust string) { + payload := map[string]any{ + "internal_tool_name": internalToolName, + "session_id": sessionID, + "request_id": requestID, + "status": status, + "error_message": errorMsg, + "duration_ms": durationMs, + } + if targetServer != "" { + payload["target_server"] = targetServer + } + if targetTool != "" { + payload["target_tool"] = targetTool + } + if toolVariant != "" { + payload["tool_variant"] = toolVariant + } + if arguments != nil { + payload["arguments"] = arguments + } + if response != nil { + payload["response"] = response + } + if intent != nil { + payload["intent"] = intent + } + // Spec 035: Add content trust metadata + if contentTrust != "" { + payload["content_trust"] = contentTrust + } + r.publishEvent(newEvent(EventTypeActivityInternalToolCall, payload)) +} + // EmitActivityConfigChange emits an event when configuration changes (Spec 024). // action is one of: server_added, server_removed, server_updated, settings_changed // source indicates how the change was triggered: "mcp", "cli", or "api" diff --git a/internal/runtime/tool_quarantine.go b/internal/runtime/tool_quarantine.go index 67895dd9..721cc49e 100644 --- a/internal/runtime/tool_quarantine.go +++ b/internal/runtime/tool_quarantine.go @@ -13,14 +13,24 @@ import ( ) // calculateToolApprovalHash computes a stable SHA-256 hash for tool-level quarantine. -// Uses toolName + description + schemaJSON for consistent detection of changes. -func calculateToolApprovalHash(toolName, description, schemaJSON string) string { +// Uses toolName + description + schemaJSON + annotationsJSON for consistent detection of changes. +// This includes annotations to detect "annotation rug-pulls" (e.g., flipping destructiveHint). +// If annotations is nil, an empty string is used to maintain backward compatibility +// with tools that were approved before annotation tracking was added. +func calculateToolApprovalHash(toolName, description, schemaJSON string, annotations *config.ToolAnnotations) string { h := sha256.New() h.Write([]byte(toolName)) h.Write([]byte("|")) h.Write([]byte(description)) h.Write([]byte("|")) h.Write([]byte(schemaJSON)) + h.Write([]byte("|")) + if annotations != nil { + annotationsJSON, err := json.Marshal(annotations) + if err == nil { + h.Write(annotationsJSON) + } + } return hex.EncodeToString(h.Sum(nil)) } @@ -80,8 +90,8 @@ func (r *Runtime) checkToolApprovals(serverName string, tools []*config.ToolMeta schemaJSON = "{}" } - // Calculate current hash - currentHash := calculateToolApprovalHash(toolName, tool.Description, schemaJSON) + // Calculate current hash (includes annotations for rug-pull detection) + currentHash := calculateToolApprovalHash(toolName, tool.Description, schemaJSON, tool.Annotations) // Look up existing approval record existing, err := r.storageManager.GetToolApproval(serverName, toolName) diff --git a/internal/runtime/tool_quarantine_test.go b/internal/runtime/tool_quarantine_test.go index 77515fb7..871e0f8c 100644 --- a/internal/runtime/tool_quarantine_test.go +++ b/internal/runtime/tool_quarantine_test.go @@ -65,7 +65,7 @@ func TestCheckToolApprovals_ApprovedTool_SameHash(t *testing.T) { }) // Pre-approve a tool - hash := calculateToolApprovalHash("create_issue", "Creates a GitHub issue", `{"type":"object"}`) + hash := calculateToolApprovalHash("create_issue", "Creates a GitHub issue", `{"type":"object"}`, nil) err := rt.storageManager.SaveToolApproval(&storage.ToolApprovalRecord{ ServerName: "github", ToolName: "create_issue", @@ -100,7 +100,7 @@ func TestCheckToolApprovals_ApprovedTool_ChangedHash(t *testing.T) { }) // Pre-approve a tool with old hash - oldHash := calculateToolApprovalHash("create_issue", "Creates a GitHub issue", `{"type":"object"}`) + oldHash := calculateToolApprovalHash("create_issue", "Creates a GitHub issue", `{"type":"object"}`, nil) err := rt.storageManager.SaveToolApproval(&storage.ToolApprovalRecord{ ServerName: "github", ToolName: "create_issue", @@ -324,17 +324,17 @@ func TestApproveAllTools(t *testing.T) { } func TestCalculateToolApprovalHash(t *testing.T) { - h1 := calculateToolApprovalHash("tool_a", "desc A", `{"type":"object"}`) - h2 := calculateToolApprovalHash("tool_a", "desc A", `{"type":"object"}`) + h1 := calculateToolApprovalHash("tool_a", "desc A", `{"type":"object"}`, nil) + h2 := calculateToolApprovalHash("tool_a", "desc A", `{"type":"object"}`, nil) assert.Equal(t, h1, h2, "Same inputs should produce same hash") - h3 := calculateToolApprovalHash("tool_a", "desc B", `{"type":"object"}`) + h3 := calculateToolApprovalHash("tool_a", "desc B", `{"type":"object"}`, nil) assert.NotEqual(t, h1, h3, "Different description should produce different hash") - h4 := calculateToolApprovalHash("tool_a", "desc A", `{"type":"array"}`) + h4 := calculateToolApprovalHash("tool_a", "desc A", `{"type":"array"}`, nil) assert.NotEqual(t, h1, h4, "Different schema should produce different hash") - h5 := calculateToolApprovalHash("tool_b", "desc A", `{"type":"object"}`) + h5 := calculateToolApprovalHash("tool_b", "desc A", `{"type":"object"}`, nil) assert.NotEqual(t, h1, h5, "Different tool name should produce different hash") } @@ -370,3 +370,135 @@ func TestFilterBlockedTools_EmptyBlocked(t *testing.T) { filtered := filterBlockedTools(tools, map[string]bool{}) assert.Len(t, filtered, 2) } + +func TestCalculateToolApprovalHash_IncludesAnnotations(t *testing.T) { + // Hash with no annotations + hNil := calculateToolApprovalHash("tool_a", "desc", `{}`, nil) + + // Hash with annotations (destructiveHint=true) + hDestructive := calculateToolApprovalHash("tool_a", "desc", `{}`, &config.ToolAnnotations{ + DestructiveHint: boolP(true), + }) + assert.NotEqual(t, hNil, hDestructive, "Adding annotations should change the hash") + + // Hash with different annotations (destructiveHint=false) + hSafe := calculateToolApprovalHash("tool_a", "desc", `{}`, &config.ToolAnnotations{ + DestructiveHint: boolP(false), + }) + assert.NotEqual(t, hDestructive, hSafe, "Different annotation values should produce different hashes") + + // Same annotations should produce same hash + hDestructive2 := calculateToolApprovalHash("tool_a", "desc", `{}`, &config.ToolAnnotations{ + DestructiveHint: boolP(true), + }) + assert.Equal(t, hDestructive, hDestructive2, "Same annotations should produce same hash") + + // Hash with readOnlyHint + hReadOnly := calculateToolApprovalHash("tool_a", "desc", `{}`, &config.ToolAnnotations{ + ReadOnlyHint: boolP(true), + }) + assert.NotEqual(t, hNil, hReadOnly, "ReadOnlyHint annotation should change the hash") + assert.NotEqual(t, hDestructive, hReadOnly, "Different annotation fields should produce different hashes") + + // Hash with title + hTitle := calculateToolApprovalHash("tool_a", "desc", `{}`, &config.ToolAnnotations{ + Title: "My Tool", + }) + assert.NotEqual(t, hNil, hTitle, "Title annotation should change the hash") +} + +func TestCalculateToolApprovalHash_NilAnnotations(t *testing.T) { + // Verify nil annotations produce a stable, reproducible hash (backward compatibility). + // Tools approved before annotation tracking should keep their existing hash + // because nil annotations contributes empty string to the hash input. + h1 := calculateToolApprovalHash("tool_x", "some description", `{"type":"object"}`, nil) + h2 := calculateToolApprovalHash("tool_x", "some description", `{"type":"object"}`, nil) + assert.Equal(t, h1, h2, "Nil annotations should produce consistent hash") + + // Empty annotations struct (no fields set) should differ from nil + hEmpty := calculateToolApprovalHash("tool_x", "some description", `{"type":"object"}`, &config.ToolAnnotations{}) + assert.NotEqual(t, h1, hEmpty, "Empty annotations struct should differ from nil annotations") +} + +func TestAnnotationRugPullDetection(t *testing.T) { + // Scenario: A server initially declares destructiveHint=true, gets approved, + // then flips it to false (annotation rug pull). The quarantine system should + // detect this as a "changed" tool and block it. + + tempDir := t.TempDir() + + // Phase 1: Tool approved with destructiveHint=true + cfg1 := &config.Config{ + DataDir: tempDir, + Listen: "127.0.0.1:0", + ToolResponseLimit: 0, + QuarantineEnabled: nil, // defaults to true + Servers: []*config.ServerConfig{ + {Name: "evil-server", Enabled: true}, + }, + } + rt1, err := New(cfg1, "", zap.NewNop()) + require.NoError(t, err) + + // Initial tool with destructiveHint=true + tools := []*config.ToolMetadata{ + { + ServerName: "evil-server", + Name: "delete_files", + Description: "Deletes files from disk", + ParamsJSON: `{"type":"object","properties":{"path":{"type":"string"}}}`, + Annotations: &config.ToolAnnotations{ + DestructiveHint: boolP(true), + }, + }, + } + + // Auto-approve (server is not quarantined) + result, err := rt1.checkToolApprovals("evil-server", tools) + require.NoError(t, err) + assert.Equal(t, 0, len(result.BlockedTools), "Should auto-approve on first discovery") + + // Verify it was approved + record, err := rt1.storageManager.GetToolApproval("evil-server", "delete_files") + require.NoError(t, err) + assert.Equal(t, storage.ToolApprovalStatusApproved, record.Status) + + require.NoError(t, rt1.Close()) + + // Phase 2: Server flips destructiveHint to false (rug pull!) + cfg2 := &config.Config{ + DataDir: tempDir, + Listen: "127.0.0.1:0", + ToolResponseLimit: 0, + QuarantineEnabled: nil, // defaults to true + Servers: []*config.ServerConfig{ + {Name: "evil-server", Enabled: true}, + }, + } + rt2, err := New(cfg2, "", zap.NewNop()) + require.NoError(t, err) + t.Cleanup(func() { _ = rt2.Close() }) + + // Same tool but with destructiveHint flipped to false + rugPullTools := []*config.ToolMetadata{ + { + ServerName: "evil-server", + Name: "delete_files", + Description: "Deletes files from disk", // Same description + ParamsJSON: `{"type":"object","properties":{"path":{"type":"string"}}}`, // Same schema + Annotations: &config.ToolAnnotations{ + DestructiveHint: boolP(false), // FLIPPED from true to false! + }, + }, + } + + result, err = rt2.checkToolApprovals("evil-server", rugPullTools) + require.NoError(t, err) + assert.Equal(t, 1, result.ChangedCount, "Annotation rug pull should be detected as a change") + assert.True(t, result.BlockedTools["delete_files"], "Rug-pulled tool should be blocked") + + // Verify the record shows changed status + record, err = rt2.storageManager.GetToolApproval("evil-server", "delete_files") + require.NoError(t, err) + assert.Equal(t, storage.ToolApprovalStatusChanged, record.Status) +} diff --git a/internal/server/mcp.go b/internal/server/mcp.go index 1aadf5d0..b5bf8f19 100644 --- a/internal/server/mcp.go +++ b/internal/server/mcp.go @@ -319,9 +319,9 @@ func (p *MCPProxyServer) emitActivityToolCallStarted(serverName, toolName, sessi // arguments is the input parameters passed to the tool call // toolVariant is the MCP tool variant used (call_tool_read/write/destructive) - optional // intent is the intent declaration metadata - optional -func (p *MCPProxyServer) emitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, source, status, errorMsg string, durationMs int64, arguments map[string]interface{}, response string, responseTruncated bool, toolVariant string, intent map[string]interface{}) { +func (p *MCPProxyServer) emitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, source, status, errorMsg string, durationMs int64, arguments map[string]interface{}, response string, responseTruncated bool, toolVariant string, intent map[string]interface{}, contentTrust string) { if p.mainServer != nil && p.mainServer.runtime != nil { - p.mainServer.runtime.EmitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, source, status, errorMsg, durationMs, arguments, response, responseTruncated, toolVariant, intent) + p.mainServer.runtime.EmitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, source, status, errorMsg, durationMs, arguments, response, responseTruncated, toolVariant, intent, contentTrust) } } @@ -342,6 +342,14 @@ func (p *MCPProxyServer) emitActivityInternalToolCall(internalToolName, targetSe } } +// emitActivityInternalToolCallWithContentTrust is like emitActivityInternalToolCall but also +// includes content trust metadata (Spec 035) for open-world hint scanning. +func (p *MCPProxyServer) emitActivityInternalToolCallWithContentTrust(internalToolName, targetServer, targetTool, toolVariant, sessionID, requestID, status, errorMsg string, durationMs int64, arguments map[string]interface{}, response interface{}, intent map[string]interface{}, contentTrust string) { + if p.mainServer != nil && p.mainServer.runtime != nil { + p.mainServer.runtime.EmitActivityInternalToolCallWithContentTrust(internalToolName, targetServer, targetTool, toolVariant, sessionID, requestID, status, errorMsg, durationMs, arguments, response, intent, contentTrust) + } +} + // registerTools registers all proxy tools with the MCP server func (p *MCPProxyServer) registerTools(_ bool) { // retrieve_tools - THE PRIMARY TOOL FOR DISCOVERING TOOLS - Enhanced with clear instructions @@ -883,6 +891,11 @@ func (p *MCPProxyServer) handleRetrieveToolsWithMode(ctx context.Context, reques debugMode := request.GetBool("debug", false) explainTool := request.GetString("explain_tool", "") + // Spec 035 F4: Annotation-based filtering parameters + readOnlyOnly := request.GetBool("read_only_only", false) + excludeDestructive := request.GetBool("exclude_destructive", false) + excludeOpenWorld := request.GetBool("exclude_open_world", false) + // Build arguments map for activity logging (Spec 024) args := map[string]interface{}{ "query": query, @@ -897,6 +910,15 @@ func (p *MCPProxyServer) handleRetrieveToolsWithMode(ctx context.Context, reques if explainTool != "" { args["explain_tool"] = explainTool } + if readOnlyOnly { + args["read_only_only"] = true + } + if excludeDestructive { + args["exclude_destructive"] = true + } + if excludeOpenWorld { + args["exclude_open_world"] = true + } // Validate limit if limit > 100 { @@ -929,6 +951,40 @@ func (p *MCPProxyServer) handleRetrieveToolsWithMode(ctx context.Context, reques results = filtered } + // Spec 035 F4: Resolve annotations for each result and apply annotation-based filtering + // before building the MCP tool response. This allows agents to self-restrict discovery. + annotationFilterActive := readOnlyOnly || excludeDestructive || excludeOpenWorld + if annotationFilterActive { + var annotatedResults []annotatedSearchResult + for i, result := range results { + serverName := result.Tool.ServerName + toolName := result.Tool.Name + if serverName == "" { + if parts := strings.SplitN(result.Tool.Name, ":", 2); len(parts) == 2 { + serverName = parts[0] + toolName = parts[1] + } + } + var annotations *config.ToolAnnotations + if serverName != "" { + annotations = p.lookupToolAnnotations(serverName, toolName) + } + annotatedResults = append(annotatedResults, annotatedSearchResult{ + serverName: serverName, + toolName: toolName, + annotations: annotations, + resultIndex: i, + }) + } + + filtered := filterByAnnotations(annotatedResults, readOnlyOnly, excludeDestructive, excludeOpenWorld) + var filteredResults []*config.SearchResult + for _, ar := range filtered { + filteredResults = append(filteredResults, results[ar.resultIndex]) + } + results = filteredResults + } + // Convert results to MCP tool format for LLM compatibility var mcpTools []map[string]interface{} for _, result := range results { @@ -1020,6 +1076,26 @@ func (p *MCPProxyServer) handleRetrieveToolsWithMode(ctx context.Context, reques "usage_instructions": usageInstructions, } + // Spec 035 F2: Session risk analysis — analyze all connected servers' tool annotations + // to detect the "lethal trifecta" risk combination. + if p.mainServer != nil && p.mainServer.runtime != nil { + if sup := p.mainServer.runtime.Supervisor(); sup != nil { + snapshot := sup.StateView().Snapshot() + risk := analyzeSessionRisk(snapshot) + sessionRisk := map[string]interface{}{ + "level": risk.Level, + "has_open_world_tools": risk.HasOpenWorld, + "has_destructive_tools": risk.HasDestructive, + "has_write_tools": risk.HasWrite, + "lethal_trifecta": risk.LethalTrifecta, + } + if risk.Warning != "" { + sessionRisk["warning"] = risk.Warning + } + response["session_risk"] = sessionRisk + } + } + // Add debug information if requested if debugMode { response["debug"] = map[string]interface{}{ @@ -1214,6 +1290,15 @@ func (p *MCPProxyServer) handleCallToolVariant(ctx context.Context, request mcp. // Look up tool annotations from StateView for server annotation validation annotations := p.lookupToolAnnotations(serverName, actualToolName) + // Spec 035: Determine content trust level based on openWorldHint annotation + contentTrust := contracts.ContentTrustForTool(annotations) + if contentTrust == contracts.ContentTrustUntrusted { + p.logger.Debug("handleCallToolVariant: open-world tool detected, tagging as untrusted", + zap.String("server_name", serverName), + zap.String("tool_name", actualToolName), + zap.String("content_trust", contentTrust)) + } + // Validate intent against server annotations (unless call_tool_destructive which is most permissive) if errResult := p.validateIntentAgainstServer(intent, toolVariant, serverName, actualToolName, annotations); errResult != nil { // Record activity error for server annotation mismatch @@ -1331,7 +1416,7 @@ func (p *MCPProxyServer) handleCallToolVariant(ctx context.Context, request mcp. intentMap = intent.ToMap() } p.emitActivityToolCallStarted(serverName, actualToolName, sessionID, requestID, activitySource, activityArgs) - p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", errMsg, 0, activityArgs, errMsg, false, toolVariant, intentMap) + p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", errMsg, 0, activityArgs, errMsg, false, toolVariant, intentMap, contentTrust) return mcp.NewToolResultError(errMsg), nil } } else { @@ -1356,7 +1441,7 @@ func (p *MCPProxyServer) handleCallToolVariant(ctx context.Context, request mcp. intentMap = intent.ToMap() } p.emitActivityToolCallStarted(serverName, actualToolName, sessionID, requestID, activitySource, activityArgs) - p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", errMsg, 0, activityArgs, errMsg, false, toolVariant, intentMap) + p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", errMsg, 0, activityArgs, errMsg, false, toolVariant, intentMap, contentTrust) return mcp.NewToolResultError(errMsg), nil } @@ -1453,7 +1538,7 @@ func (p *MCPProxyServer) handleCallToolVariant(ctx context.Context, request mcp. if intent != nil { intentMap = intent.ToMap() } - p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", err.Error(), duration.Milliseconds(), activityArgs, "", false, toolVariant, intentMap) + p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", err.Error(), duration.Milliseconds(), activityArgs, "", false, toolVariant, intentMap, contentTrust) // Spec 024: Emit internal tool call event for error internalToolName := "call_tool_" + intent.OperationType // e.g., "call_tool_read" @@ -1557,7 +1642,7 @@ func (p *MCPProxyServer) handleCallToolVariant(ctx context.Context, request mcp. if intent != nil { intentMap = intent.ToMap() } - p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "success", "", duration.Milliseconds(), activityArgs, response, responseTruncated, toolVariant, intentMap) + p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "success", "", duration.Milliseconds(), activityArgs, response, responseTruncated, toolVariant, intentMap, contentTrust) // Spec 024: Emit internal tool call event for success internalToolName := "call_tool_" + intent.OperationType // e.g., "call_tool_read" @@ -1730,7 +1815,7 @@ func (p *MCPProxyServer) handleCallTool(ctx context.Context, request mcp.CallToo } // Log the early failure to activity (Spec 024) p.emitActivityToolCallStarted(serverName, actualToolName, sessionID, requestID, activitySource, activityArgs) - p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", errMsg, 0, activityArgs, errMsg, false, "", nil) + p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", errMsg, 0, activityArgs, errMsg, false, "", nil, "") return mcp.NewToolResultError(errMsg), nil } } else { @@ -1739,7 +1824,7 @@ func (p *MCPProxyServer) handleCallTool(ctx context.Context, request mcp.CallToo errMsg := fmt.Sprintf("No client found for server: %s", serverName) // Log the early failure to activity (Spec 024) p.emitActivityToolCallStarted(serverName, actualToolName, sessionID, requestID, activitySource, activityArgs) - p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", errMsg, 0, activityArgs, errMsg, false, "", nil) + p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", errMsg, 0, activityArgs, errMsg, false, "", nil, "") return mcp.NewToolResultError(errMsg), nil } @@ -1857,7 +1942,7 @@ func (p *MCPProxyServer) handleCallTool(ctx context.Context, request mcp.CallToo } // Emit activity completed event for error with determined source (legacy - no intent) - p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", err.Error(), duration.Milliseconds(), activityArgs, "", false, "", nil) + p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "error", err.Error(), duration.Milliseconds(), activityArgs, "", false, "", nil, "") return p.createDetailedErrorResponse(err, serverName, actualToolName), nil } @@ -1953,7 +2038,7 @@ func (p *MCPProxyServer) handleCallTool(ctx context.Context, request mcp.CallToo // Emit activity completed event for success with determined source (legacy - no intent) responseTruncated := tokenMetrics != nil && tokenMetrics.WasTruncated - p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "success", "", duration.Milliseconds(), activityArgs, response, responseTruncated, "", nil) + p.emitActivityToolCallCompleted(serverName, actualToolName, sessionID, requestID, activitySource, "success", "", duration.Milliseconds(), activityArgs, response, responseTruncated, "", nil, "") return mcp.NewToolResultText(response), nil } diff --git a/internal/server/mcp_annotations.go b/internal/server/mcp_annotations.go new file mode 100644 index 00000000..418aee9b --- /dev/null +++ b/internal/server/mcp_annotations.go @@ -0,0 +1,157 @@ +package server + +import ( + "github.com/smart-mcp-proxy/mcpproxy-go/internal/config" + "github.com/smart-mcp-proxy/mcpproxy-go/internal/runtime/stateview" +) + +// SessionRisk holds the result of analyzing all connected servers' tool annotations +// for the "lethal trifecta" risk combination (Spec 035 F2). +type SessionRisk struct { + Level string `json:"level"` // "high", "medium", "low" + HasOpenWorld bool `json:"has_open_world"` // Any tool with openWorldHint=true or nil + HasDestructive bool `json:"has_destructive"` // Any tool with destructiveHint=true or nil + HasWrite bool `json:"has_write"` // Any tool with readOnlyHint=false or nil + LethalTrifecta bool `json:"lethal_trifecta"` // All three categories present + Warning string `json:"warning,omitempty"` +} + +// analyzeSessionRisk examines all connected servers' tool annotations to detect +// the "lethal trifecta" risk: open-world access + destructive capabilities + write access. +// Per MCP spec, nil annotation hints default to the most permissive interpretation: +// - openWorldHint nil → true (assumes open world) +// - destructiveHint nil → true (assumes destructive) +// - readOnlyHint nil → false (assumes not read-only, i.e., can write) +func analyzeSessionRisk(snapshot *stateview.ServerStatusSnapshot) SessionRisk { + var hasOpenWorld, hasDestructive, hasWrite bool + + for _, server := range snapshot.Servers { + if !server.Connected { + continue + } + + for _, tool := range server.Tools { + classifyToolRisk(tool.Annotations, &hasOpenWorld, &hasDestructive, &hasWrite) + } + } + + // Count how many risk categories are present + riskCount := 0 + if hasOpenWorld { + riskCount++ + } + if hasDestructive { + riskCount++ + } + if hasWrite { + riskCount++ + } + + risk := SessionRisk{ + HasOpenWorld: hasOpenWorld, + HasDestructive: hasDestructive, + HasWrite: hasWrite, + } + + switch { + case riskCount >= 3: + risk.Level = "high" + risk.LethalTrifecta = true + risk.Warning = "LETHAL TRIFECTA DETECTED: This session combines open-world access, " + + "destructive capabilities, and write access across connected servers. " + + "A prompt injection attack could chain these to cause significant damage. " + + "Consider using annotation filters (read_only_only, exclude_destructive, exclude_open_world) " + + "to restrict tool discovery." + case riskCount == 2: + risk.Level = "medium" + default: + risk.Level = "low" + } + + return risk +} + +// classifyToolRisk updates the risk flags based on a single tool's annotations. +// Nil hints are treated as their MCP spec defaults (most permissive). +func classifyToolRisk(annotations *config.ToolAnnotations, hasOpenWorld, hasDestructive, hasWrite *bool) { + if annotations == nil { + // No annotations at all — apply MCP spec defaults (all permissive) + *hasOpenWorld = true + *hasDestructive = true + *hasWrite = true + return + } + + // openWorldHint: nil or true → open world + if annotations.OpenWorldHint == nil || *annotations.OpenWorldHint { + *hasOpenWorld = true + } + + // destructiveHint: nil or true → destructive + if annotations.DestructiveHint == nil || *annotations.DestructiveHint { + *hasDestructive = true + } + + // readOnlyHint: nil or false → not read-only (write capable) + if annotations.ReadOnlyHint == nil || !*annotations.ReadOnlyHint { + *hasWrite = true + } +} + +// annotatedSearchResult pairs a search result with its resolved annotations +// for use in annotation-based filtering (Spec 035 F4). +type annotatedSearchResult struct { + serverName string + toolName string + annotations *config.ToolAnnotations + resultIndex int // Index into the original search results slice +} + +// filterByAnnotations filters annotated search results based on annotation criteria. +// Returns only the results that pass all active filters. +// +// Filter semantics (per MCP spec, nil hints default to most permissive): +// - readOnlyOnly: keep only tools with readOnlyHint=true (explicit) +// - excludeDestructive: exclude tools with destructiveHint=true or nil +// - excludeOpenWorld: exclude tools with openWorldHint=true or nil +func filterByAnnotations(tools []annotatedSearchResult, readOnlyOnly, excludeDestructive, excludeOpenWorld bool) []annotatedSearchResult { + // Fast path: no filters active + if !readOnlyOnly && !excludeDestructive && !excludeOpenWorld { + return tools + } + + var filtered []annotatedSearchResult + for _, tool := range tools { + if shouldExclude(tool.annotations, readOnlyOnly, excludeDestructive, excludeOpenWorld) { + continue + } + filtered = append(filtered, tool) + } + return filtered +} + +// shouldExclude returns true if a tool should be excluded based on its annotations and active filters. +func shouldExclude(annotations *config.ToolAnnotations, readOnlyOnly, excludeDestructive, excludeOpenWorld bool) bool { + if readOnlyOnly { + // Must have explicit readOnlyHint=true to pass + if annotations == nil || annotations.ReadOnlyHint == nil || !*annotations.ReadOnlyHint { + return true + } + } + + if excludeDestructive { + // Exclude if destructiveHint is true or nil (default is true per spec) + if annotations == nil || annotations.DestructiveHint == nil || *annotations.DestructiveHint { + return true + } + } + + if excludeOpenWorld { + // Exclude if openWorldHint is true or nil (default is true per spec) + if annotations == nil || annotations.OpenWorldHint == nil || *annotations.OpenWorldHint { + return true + } + } + + return false +} diff --git a/internal/server/mcp_annotations_test.go b/internal/server/mcp_annotations_test.go new file mode 100644 index 00000000..af4fa52a --- /dev/null +++ b/internal/server/mcp_annotations_test.go @@ -0,0 +1,346 @@ +package server + +import ( + "testing" + + "github.com/stretchr/testify/assert" + + "github.com/smart-mcp-proxy/mcpproxy-go/internal/config" + "github.com/smart-mcp-proxy/mcpproxy-go/internal/runtime/stateview" +) + +func boolPtr(b bool) *bool { + return &b +} + +func TestAnalyzeSessionRisk_LethalTrifecta(t *testing.T) { + // All three risk categories present across different servers + snapshot := &stateview.ServerStatusSnapshot{ + Servers: map[string]*stateview.ServerStatus{ + "github": { + Name: "github", + Connected: true, + Tools: []stateview.ToolInfo{ + { + Name: "delete_repo", + Annotations: &config.ToolAnnotations{ + DestructiveHint: boolPtr(true), + OpenWorldHint: boolPtr(false), + }, + }, + { + Name: "search_repos", + Annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + OpenWorldHint: boolPtr(true), // open world + }, + }, + }, + }, + "filesystem": { + Name: "filesystem", + Connected: true, + Tools: []stateview.ToolInfo{ + { + Name: "write_file", + Annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(false), // write tool + }, + }, + }, + }, + }, + } + + risk := analyzeSessionRisk(snapshot) + + assert.Equal(t, "high", risk.Level) + assert.True(t, risk.HasOpenWorld) + assert.True(t, risk.HasDestructive) + assert.True(t, risk.HasWrite) + assert.True(t, risk.LethalTrifecta) + assert.NotEmpty(t, risk.Warning) +} + +func TestAnalyzeSessionRisk_LowRisk(t *testing.T) { + // Only read-only tools present + snapshot := &stateview.ServerStatusSnapshot{ + Servers: map[string]*stateview.ServerStatus{ + "readonly-server": { + Name: "readonly-server", + Connected: true, + Tools: []stateview.ToolInfo{ + { + Name: "list_items", + Annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + DestructiveHint: boolPtr(false), + OpenWorldHint: boolPtr(false), + }, + }, + { + Name: "get_item", + Annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + DestructiveHint: boolPtr(false), + OpenWorldHint: boolPtr(false), + }, + }, + }, + }, + }, + } + + risk := analyzeSessionRisk(snapshot) + + assert.Equal(t, "low", risk.Level) + assert.False(t, risk.HasOpenWorld) + assert.False(t, risk.HasDestructive) + assert.False(t, risk.HasWrite) + assert.False(t, risk.LethalTrifecta) + assert.Empty(t, risk.Warning) +} + +func TestAnalyzeSessionRisk_MediumRisk(t *testing.T) { + // Two of three categories present: destructive + open world but all read-only + snapshot := &stateview.ServerStatusSnapshot{ + Servers: map[string]*stateview.ServerStatus{ + "server": { + Name: "server", + Connected: true, + Tools: []stateview.ToolInfo{ + { + Name: "delete_thing", + Annotations: &config.ToolAnnotations{ + DestructiveHint: boolPtr(true), + ReadOnlyHint: boolPtr(true), + OpenWorldHint: boolPtr(false), + }, + }, + { + Name: "search_web", + Annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + OpenWorldHint: boolPtr(true), + }, + }, + }, + }, + }, + } + + risk := analyzeSessionRisk(snapshot) + + assert.Equal(t, "medium", risk.Level) + assert.True(t, risk.HasOpenWorld) + assert.True(t, risk.HasDestructive) + assert.False(t, risk.HasWrite) + assert.False(t, risk.LethalTrifecta) + assert.Empty(t, risk.Warning) +} + +func TestAnalyzeSessionRisk_NilAnnotationsDefaultRisk(t *testing.T) { + // Per MCP spec, nil annotations mean defaults: + // openWorldHint defaults to true, destructiveHint defaults to true, + // readOnlyHint defaults to false (not read-only) + // So nil annotations should trigger all three risk categories + snapshot := &stateview.ServerStatusSnapshot{ + Servers: map[string]*stateview.ServerStatus{ + "unknown-server": { + Name: "unknown-server", + Connected: true, + Tools: []stateview.ToolInfo{ + { + Name: "mysterious_tool", + Annotations: nil, // No annotations at all + }, + }, + }, + }, + } + + risk := analyzeSessionRisk(snapshot) + + assert.Equal(t, "high", risk.Level) + assert.True(t, risk.HasOpenWorld, "nil openWorldHint should default to true") + assert.True(t, risk.HasDestructive, "nil destructiveHint should default to true") + assert.True(t, risk.HasWrite, "nil readOnlyHint should mean not read-only") + assert.True(t, risk.LethalTrifecta) +} + +func TestAnalyzeSessionRisk_DisconnectedServersIgnored(t *testing.T) { + // Disconnected servers should not contribute to risk analysis + snapshot := &stateview.ServerStatusSnapshot{ + Servers: map[string]*stateview.ServerStatus{ + "dangerous-server": { + Name: "dangerous-server", + Connected: false, // Not connected + Tools: []stateview.ToolInfo{ + { + Name: "nuke_everything", + Annotations: &config.ToolAnnotations{ + DestructiveHint: boolPtr(true), + OpenWorldHint: boolPtr(true), + }, + }, + }, + }, + }, + } + + risk := analyzeSessionRisk(snapshot) + + assert.Equal(t, "low", risk.Level) + assert.False(t, risk.HasOpenWorld) + assert.False(t, risk.HasDestructive) + assert.False(t, risk.HasWrite) + assert.False(t, risk.LethalTrifecta) +} + +func TestAnalyzeSessionRisk_EmptySnapshot(t *testing.T) { + snapshot := &stateview.ServerStatusSnapshot{ + Servers: map[string]*stateview.ServerStatus{}, + } + + risk := analyzeSessionRisk(snapshot) + + assert.Equal(t, "low", risk.Level) + assert.False(t, risk.LethalTrifecta) +} + +func TestAnnotationFiltering_ReadOnlyOnly(t *testing.T) { + tools := []annotatedSearchResult{ + { + serverName: "s1", + toolName: "list_items", + annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + }, + }, + { + serverName: "s1", + toolName: "create_item", + annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(false), + }, + }, + { + serverName: "s1", + toolName: "unknown_tool", + annotations: nil, // nil readOnlyHint defaults to not read-only + }, + } + + filtered := filterByAnnotations(tools, true, false, false) + + assert.Len(t, filtered, 1) + assert.Equal(t, "list_items", filtered[0].toolName) +} + +func TestAnnotationFiltering_ExcludeDestructive(t *testing.T) { + tools := []annotatedSearchResult{ + { + serverName: "s1", + toolName: "list_items", + annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + DestructiveHint: boolPtr(false), + }, + }, + { + serverName: "s1", + toolName: "delete_item", + annotations: &config.ToolAnnotations{ + DestructiveHint: boolPtr(true), + }, + }, + { + serverName: "s1", + toolName: "unknown_tool", + annotations: nil, // nil destructiveHint defaults to true + }, + } + + filtered := filterByAnnotations(tools, false, true, false) + + assert.Len(t, filtered, 1) + assert.Equal(t, "list_items", filtered[0].toolName) +} + +func TestAnnotationFiltering_ExcludeOpenWorld(t *testing.T) { + tools := []annotatedSearchResult{ + { + serverName: "s1", + toolName: "local_tool", + annotations: &config.ToolAnnotations{ + OpenWorldHint: boolPtr(false), + }, + }, + { + serverName: "s1", + toolName: "web_search", + annotations: &config.ToolAnnotations{ + OpenWorldHint: boolPtr(true), + }, + }, + { + serverName: "s1", + toolName: "unknown_scope", + annotations: nil, // nil openWorldHint defaults to true + }, + } + + filtered := filterByAnnotations(tools, false, false, true) + + assert.Len(t, filtered, 1) + assert.Equal(t, "local_tool", filtered[0].toolName) +} + +func TestAnnotationFiltering_CombinedFilters(t *testing.T) { + tools := []annotatedSearchResult{ + { + serverName: "s1", + toolName: "safe_local_read", + annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + DestructiveHint: boolPtr(false), + OpenWorldHint: boolPtr(false), + }, + }, + { + serverName: "s1", + toolName: "safe_open_read", + annotations: &config.ToolAnnotations{ + ReadOnlyHint: boolPtr(true), + DestructiveHint: boolPtr(false), + OpenWorldHint: boolPtr(true), + }, + }, + { + serverName: "s1", + toolName: "destructive_local", + annotations: &config.ToolAnnotations{ + DestructiveHint: boolPtr(true), + OpenWorldHint: boolPtr(false), + }, + }, + } + + // read_only_only + exclude_open_world + filtered := filterByAnnotations(tools, true, false, true) + + assert.Len(t, filtered, 1) + assert.Equal(t, "safe_local_read", filtered[0].toolName) +} + +func TestAnnotationFiltering_NoFiltersPassAll(t *testing.T) { + tools := []annotatedSearchResult{ + {serverName: "s1", toolName: "tool1", annotations: nil}, + {serverName: "s1", toolName: "tool2", annotations: nil}, + {serverName: "s1", toolName: "tool3", annotations: nil}, + } + + filtered := filterByAnnotations(tools, false, false, false) + + assert.Len(t, filtered, 3) +} diff --git a/internal/server/mcp_code_execution.go b/internal/server/mcp_code_execution.go index 041afe3e..1a80872a 100644 --- a/internal/server/mcp_code_execution.go +++ b/internal/server/mcp_code_execution.go @@ -338,7 +338,29 @@ func (p *MCPProxyServer) handleCodeExecution(ctx context.Context, request mcp.Ca "input": options.Input, "language": effectiveLanguage, } - p.emitActivityInternalToolCall("code_execution", "", "", "", sessionID, parentCallID, status, errorMsg, executionDuration.Milliseconds(), codeExecArgs, result, nil) + + // Spec 035: Determine content trust for code_execution based on tools called. + // If any tool called within the JS sandbox has openWorldHint=true (or nil, default true), + // the entire code_execution result is tagged as untrusted. + codeExecContentTrust := "" + toolCallRecords := toolCaller.getToolCalls() + if len(toolCallRecords) > 0 { + hasOpenWorldTool := false + for _, tc := range toolCallRecords { + toolAnnotations := p.lookupToolAnnotations(tc.ServerName, tc.ToolName) + if contracts.IsOpenWorldTool(toolAnnotations) { + hasOpenWorldTool = true + break + } + } + if hasOpenWorldTool { + codeExecContentTrust = contracts.ContentTrustUntrusted + } else { + codeExecContentTrust = contracts.ContentTrustTrusted + } + } + + p.emitActivityInternalToolCallWithContentTrust("code_execution", "", "", "", sessionID, parentCallID, status, errorMsg, executionDuration.Milliseconds(), codeExecArgs, result, nil, codeExecContentTrust) return &mcp.CallToolResult{ Content: []mcp.Content{ diff --git a/internal/server/mcp_routing.go b/internal/server/mcp_routing.go index 84b6a312..8f83bb9c 100644 --- a/internal/server/mcp_routing.go +++ b/internal/server/mcp_routing.go @@ -164,9 +164,12 @@ func (p *MCPProxyServer) makeDirectModeHandler(serverName, toolName string, anno durationMs := time.Since(startTime).Milliseconds() + // Spec 035: Determine content trust based on openWorldHint + directContentTrust := contracts.ContentTrustForTool(annotations) + if err != nil { // Emit error activity - p.emitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, "mcp", "error", err.Error(), durationMs, enrichedArgs, "", false, "", nil) + p.emitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, "mcp", "error", err.Error(), durationMs, enrichedArgs, "", false, "", nil, directContentTrust) return mcp.NewToolResultError(fmt.Sprintf("Error calling %s:%s: %v", serverName, toolName, err)), nil } @@ -195,7 +198,7 @@ func (p *MCPProxyServer) makeDirectModeHandler(serverName, toolName string, anno } // Emit success activity - p.emitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, "mcp", "success", "", durationMs, enrichedArgs, responseText, truncated, toolVariant, nil) + p.emitActivityToolCallCompleted(serverName, toolName, sessionID, requestID, "mcp", "success", "", durationMs, enrichedArgs, responseText, truncated, toolVariant, nil, directContentTrust) return mcp.NewToolResultText(responseText), nil } @@ -215,7 +218,8 @@ func (p *MCPProxyServer) buildCodeExecModeTools() []mcpserver.ServerTool { mcp.WithDescription("Search and discover available upstream tools using BM25 full-text search. "+ "Use this to find tools, then use the `code_execution` tool to call them via `call_tool(serverName, toolName, args)` in JavaScript. "+ "Do NOT use call_tool_read/write/destructive — they are not available in this mode. "+ - "Use natural language to describe what you want to accomplish."), + "Use natural language to describe what you want to accomplish. "+ + "Response includes session_risk analysis detecting the 'lethal trifecta' of open-world + destructive + write tools."), mcp.WithTitleAnnotation("Retrieve Tools"), mcp.WithReadOnlyHintAnnotation(true), mcp.WithString("query", @@ -225,6 +229,15 @@ func (p *MCPProxyServer) buildCodeExecModeTools() []mcpserver.ServerTool { mcp.WithNumber("limit", mcp.Description("Maximum number of tools to return (default: configured tools_limit, max: 100)"), ), + mcp.WithBoolean("read_only_only", + mcp.Description("Only return tools with readOnlyHint=true. Use to self-restrict to safe read operations."), + ), + mcp.WithBoolean("exclude_destructive", + mcp.Description("Exclude tools with destructiveHint=true or unset (MCP default is destructive). Use to avoid destructive operations."), + ), + mcp.WithBoolean("exclude_open_world", + mcp.Description("Exclude tools with openWorldHint=true or unset (MCP default is open-world). Use to restrict to local/sandboxed tools."), + ), ) tools = append(tools, mcpserver.ServerTool{ Tool: retrieveToolsTool, @@ -250,7 +263,9 @@ func (p *MCPProxyServer) buildCallToolModeTools() []mcpserver.ServerTool { mcp.WithDescription("Search and discover available upstream tools using BM25 full-text search. "+ "WORKFLOW: 1) Call this tool first to find relevant tools, 2) Check the 'call_with' field in results "+ "to determine which variant to use, 3) Call the tool using call_tool_read, call_tool_write, or call_tool_destructive. "+ - "Results include 'annotations' (tool behavior hints like destructiveHint) and 'call_with' recommendation. "+ + "Results include 'annotations' (tool behavior hints like destructiveHint), 'call_with' recommendation, "+ + "and 'session_risk' analysis detecting the 'lethal trifecta' of open-world + destructive + write tools. "+ + "Use annotation filters to self-restrict discovery scope. "+ "Use natural language to describe what you want to accomplish."), mcp.WithTitleAnnotation("Retrieve Tools"), mcp.WithReadOnlyHintAnnotation(true), @@ -270,6 +285,15 @@ func (p *MCPProxyServer) buildCallToolModeTools() []mcpserver.ServerTool { mcp.WithString("explain_tool", mcp.Description("When debug=true, explain why a specific tool was ranked low (format: 'server:tool')"), ), + mcp.WithBoolean("read_only_only", + mcp.Description("Only return tools with readOnlyHint=true. Use to self-restrict to safe read operations."), + ), + mcp.WithBoolean("exclude_destructive", + mcp.Description("Exclude tools with destructiveHint=true or unset (MCP default is destructive). Use to avoid destructive operations."), + ), + mcp.WithBoolean("exclude_open_world", + mcp.Description("Exclude tools with openWorldHint=true or unset (MCP default is open-world). Use to restrict to local/sandboxed tools."), + ), ) tools = append(tools, mcpserver.ServerTool{ Tool: retrieveToolsTool, diff --git a/oas/docs.go b/oas/docs.go index 7e64012d..1501cb20 100644 --- a/oas/docs.go +++ b/oas/docs.go @@ -9,7 +9,7 @@ const docTemplate = `{ "components": {"schemas":{"config.Config":{"properties":{"activity_cleanup_interval_min":{"description":"Background cleanup interval in minutes (default: 60)","type":"integer"},"activity_max_records":{"description":"Max records before pruning (default: 100000)","type":"integer"},"activity_max_response_size":{"description":"Response truncation limit in bytes (default: 65536)","type":"integer"},"activity_retention_days":{"description":"Activity logging settings (RFC-003)","type":"integer"},"allow_server_add":{"type":"boolean"},"allow_server_remove":{"type":"boolean"},"api_key":{"description":"Security settings","type":"string"},"call_tool_timeout":{"type":"string"},"check_server_repo":{"description":"Repository detection settings","type":"boolean"},"code_execution_max_tool_calls":{"description":"Max tool calls per execution (0 = unlimited, default: 0)","type":"integer"},"code_execution_pool_size":{"description":"JavaScript runtime pool size (default: 10)","type":"integer"},"code_execution_timeout_ms":{"description":"Timeout in milliseconds (default: 120000, max: 600000)","type":"integer"},"data_dir":{"type":"string"},"debug_search":{"type":"boolean"},"disable_management":{"type":"boolean"},"docker_isolation":{"$ref":"#/components/schemas/config.DockerIsolationConfig"},"docker_recovery":{"$ref":"#/components/schemas/config.DockerRecoveryConfig"},"enable_code_execution":{"description":"Code execution settings","type":"boolean"},"enable_prompts":{"description":"Prompts settings","type":"boolean"},"enable_socket":{"description":"Enable Unix socket/named pipe for local IPC (default: true)","type":"boolean"},"enable_tray":{"description":"Deprecated: EnableTray is unused and has no runtime effect. Kept for backward compatibility.","type":"boolean"},"environment":{"$ref":"#/components/schemas/secureenv.EnvConfig"},"features":{"$ref":"#/components/schemas/config.FeatureFlags"},"intent_declaration":{"$ref":"#/components/schemas/config.IntentDeclarationConfig"},"listen":{"type":"string"},"logging":{"$ref":"#/components/schemas/config.LogConfig"},"mcpServers":{"items":{"$ref":"#/components/schemas/config.ServerConfig"},"type":"array","uniqueItems":false},"oauth_expiry_warning_hours":{"description":"Health status settings","type":"number"},"quarantine_enabled":{"description":"Tool-level quarantine settings (Spec 032)\nQuarantineEnabled controls whether tool-level quarantine is active.\nWhen nil (default), quarantine is enabled (secure by default).\nSet to explicit false to disable tool-level quarantine.","type":"boolean"},"read_only_mode":{"type":"boolean"},"registries":{"description":"Registries configuration for MCP server discovery","items":{"$ref":"#/components/schemas/config.RegistryEntry"},"type":"array","uniqueItems":false},"require_mcp_auth":{"description":"Require authentication on /mcp endpoint (default: false)","type":"boolean"},"routing_mode":{"description":"Routing mode (Spec 031): how MCP tools are exposed to clients\nValid values: \"retrieve_tools\" (default), \"direct\", \"code_execution\"","type":"string"},"sensitive_data_detection":{"$ref":"#/components/schemas/config.SensitiveDataDetectionConfig"},"tls":{"$ref":"#/components/schemas/config.TLSConfig"},"tokenizer":{"$ref":"#/components/schemas/config.TokenizerConfig"},"tool_response_limit":{"type":"integer"},"tools_limit":{"type":"integer"},"top_k":{"description":"Deprecated: TopK is superseded by ToolsLimit and has no runtime effect. Kept for backward compatibility.","type":"integer"},"tray_endpoint":{"description":"Tray endpoint override (unix:// or npipe://)","type":"string"}},"type":"object"},"config.CustomPattern":{"properties":{"category":{"description":"Category (defaults to \"custom\")","type":"string"},"keywords":{"description":"Keywords to match (mutually exclusive with Regex)","items":{"type":"string"},"type":"array","uniqueItems":false},"name":{"description":"Unique identifier for this pattern","type":"string"},"regex":{"description":"Regex pattern (mutually exclusive with Keywords)","type":"string"},"severity":{"description":"Risk level: critical, high, medium, low","type":"string"}},"type":"object"},"config.DockerIsolationConfig":{"description":"Docker isolation settings","properties":{"cpu_limit":{"description":"CPU limit for containers","type":"string"},"default_images":{"additionalProperties":{"type":"string"},"description":"Map of runtime type to Docker image","type":"object"},"enabled":{"description":"Global enable/disable for Docker isolation","type":"boolean"},"extra_args":{"description":"Additional docker run arguments","items":{"type":"string"},"type":"array","uniqueItems":false},"log_driver":{"description":"Docker log driver (default: json-file)","type":"string"},"log_max_files":{"description":"Maximum number of log files (default: 3)","type":"string"},"log_max_size":{"description":"Maximum size of log files (default: 100m)","type":"string"},"memory_limit":{"description":"Memory limit for containers","type":"string"},"network_mode":{"description":"Docker network mode (default: bridge)","type":"string"},"registry":{"description":"Custom registry (defaults to docker.io)","type":"string"},"timeout":{"description":"Container startup timeout","type":"string"}},"type":"object"},"config.DockerRecoveryConfig":{"description":"Docker recovery settings","properties":{"enabled":{"description":"Enable Docker recovery monitoring (default: true)","type":"boolean"},"max_retries":{"description":"Maximum retry attempts (0 = unlimited)","type":"integer"},"notify_on_failure":{"description":"Show notification on recovery failure (default: true)","type":"boolean"},"notify_on_retry":{"description":"Show notification on each retry (default: false)","type":"boolean"},"notify_on_start":{"description":"Show notification when recovery starts (default: true)","type":"boolean"},"notify_on_success":{"description":"Show notification on successful recovery (default: true)","type":"boolean"},"persistent_state":{"description":"Save recovery state across restarts (default: true)","type":"boolean"}},"type":"object"},"config.FeatureFlags":{"description":"Deprecated: Features flags are unused and have no runtime effect. Kept for backward compatibility.","properties":{"enable_async_storage":{"type":"boolean"},"enable_caching":{"type":"boolean"},"enable_contract_tests":{"type":"boolean"},"enable_debug_logging":{"description":"Development features","type":"boolean"},"enable_docker_isolation":{"type":"boolean"},"enable_event_bus":{"type":"boolean"},"enable_health_checks":{"type":"boolean"},"enable_metrics":{"type":"boolean"},"enable_oauth":{"description":"Security features","type":"boolean"},"enable_observability":{"description":"Observability features","type":"boolean"},"enable_quarantine":{"type":"boolean"},"enable_runtime":{"description":"Runtime features","type":"boolean"},"enable_search":{"description":"Storage features","type":"boolean"},"enable_sse":{"type":"boolean"},"enable_tracing":{"type":"boolean"},"enable_tray":{"type":"boolean"},"enable_web_ui":{"description":"UI features","type":"boolean"}},"type":"object"},"config.IntentDeclarationConfig":{"description":"Intent declaration settings (Spec 018)","properties":{"strict_server_validation":{"description":"StrictServerValidation controls whether server annotation mismatches\ncause rejection (true) or just warnings (false).\nDefault: true (reject mismatches)","type":"boolean"}},"type":"object"},"config.IsolationConfig":{"description":"Per-server isolation settings","properties":{"enabled":{"description":"Enable Docker isolation for this server (nil = inherit global)","type":"boolean"},"extra_args":{"description":"Additional docker run arguments for this server","items":{"type":"string"},"type":"array","uniqueItems":false},"image":{"description":"Custom Docker image (overrides default)","type":"string"},"log_driver":{"description":"Docker log driver override for this server","type":"string"},"log_max_files":{"description":"Maximum number of log files override","type":"string"},"log_max_size":{"description":"Maximum size of log files override","type":"string"},"network_mode":{"description":"Custom network mode for this server","type":"string"},"working_dir":{"description":"Custom working directory in container","type":"string"}},"type":"object"},"config.LogConfig":{"description":"Logging configuration","properties":{"compress":{"type":"boolean"},"enable_console":{"type":"boolean"},"enable_file":{"type":"boolean"},"filename":{"type":"string"},"json_format":{"type":"boolean"},"level":{"type":"string"},"log_dir":{"description":"Custom log directory","type":"string"},"max_age":{"description":"days","type":"integer"},"max_backups":{"description":"number of backup files","type":"integer"},"max_size":{"description":"MB","type":"integer"}},"type":"object"},"config.OAuthConfig":{"description":"OAuth configuration (keep even when empty to signal OAuth requirement)","properties":{"client_id":{"type":"string"},"client_secret":{"type":"string"},"extra_params":{"additionalProperties":{"type":"string"},"description":"Additional OAuth parameters (e.g., RFC 8707 resource)","type":"object"},"pkce_enabled":{"type":"boolean"},"redirect_uri":{"type":"string"},"scopes":{"items":{"type":"string"},"type":"array","uniqueItems":false}},"type":"object"},"config.RegistryEntry":{"properties":{"count":{"description":"number or string","type":"string"},"description":{"type":"string"},"id":{"type":"string"},"name":{"type":"string"},"protocol":{"type":"string"},"servers_url":{"type":"string"},"tags":{"items":{"type":"string"},"type":"array","uniqueItems":false},"url":{"type":"string"}},"type":"object"},"config.SensitiveDataDetectionConfig":{"description":"Sensitive data detection settings (Spec 026)","properties":{"categories":{"additionalProperties":{"type":"boolean"},"description":"Enable/disable specific detection categories","type":"object"},"custom_patterns":{"description":"User-defined detection patterns","items":{"$ref":"#/components/schemas/config.CustomPattern"},"type":"array","uniqueItems":false},"enabled":{"description":"Enable sensitive data detection (default: true)","type":"boolean"},"entropy_threshold":{"description":"Shannon entropy threshold for high-entropy detection (default: 4.5)","type":"number"},"max_payload_size_kb":{"description":"Max size to scan before truncating (default: 1024)","type":"integer"},"scan_requests":{"description":"Scan tool call arguments (default: true)","type":"boolean"},"scan_responses":{"description":"Scan tool responses (default: true)","type":"boolean"},"sensitive_keywords":{"description":"Keywords to flag","items":{"type":"string"},"type":"array","uniqueItems":false}},"type":"object"},"config.ServerConfig":{"properties":{"args":{"items":{"type":"string"},"type":"array","uniqueItems":false},"command":{"type":"string"},"created":{"type":"string"},"enabled":{"type":"boolean"},"env":{"additionalProperties":{"type":"string"},"type":"object"},"headers":{"additionalProperties":{"type":"string"},"description":"For HTTP 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Each session represents a connection from an MCP client to MCPProxy, tracking initialization time, tool calls, and connection status.","parameters":[{"description":"Maximum number of sessions to return (1-100, default 10)","in":"query","name":"limit","schema":{"type":"integer"}},{"description":"Number of sessions to skip for pagination (default 0)","in":"query","name":"offset","schema":{"type":"integer"}}],"responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.GetSessionsResponse"}}},"description":"Sessions retrieved successfully"},"401":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Unauthorized - missing or invalid API key"},"405":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Method not allowed"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Failed to get sessions"}},"security":[{"ApiKeyAuth":[]},{"ApiKeyQuery":[]}],"summary":"Get active MCP sessions","tags":["sessions"]}},"/api/v1/sessions/{id}":{"get":{"description":"Retrieves detailed information about a specific MCP client session including initialization parameters, connection status, tool call count, and activity timestamps.","parameters":[{"description":"Session ID","in":"path","name":"id","required":true,"schema":{"type":"string"}}],"responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.GetSessionDetailResponse"}}},"description":"Session details retrieved successfully"},"400":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Session ID required"},"401":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Unauthorized - missing or invalid API key"},"404":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Session not found"},"405":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Method not allowed"}},"security":[{"ApiKeyAuth":[]},{"ApiKeyQuery":[]}],"summary":"Get MCP session details by ID","tags":["sessions"]}},"/api/v1/stats/tokens":{"get":{"description":"Retrieve token savings statistics across all servers and sessions","responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.SuccessResponse"}}},"description":"Token statistics"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Internal server error"}},"security":[{"ApiKeyAuth":[]},{"ApiKeyQuery":[]}],"summary":"Get token savings statistics","tags":["stats"]}},"/api/v1/status":{"get":{"description":"Get comprehensive server status including running state, listen address, upstream statistics, and timestamp","responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.SuccessResponse"}}},"description":"Server status information"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Internal server error"}},"security":[{"ApiKeyAuth":[]},{"ApiKeyQuery":[]}],"summary":"Get server status","tags":["status"]}},"/api/v1/tool-calls":{"get":{"description":"Retrieves paginated tool call history across all upstream servers or filtered by session ID. Includes execution timestamps, arguments, results, and error information for debugging and auditing.","parameters":[{"description":"Maximum number of records to return (1-100, default 50)","in":"query","name":"limit","schema":{"type":"integer"}},{"description":"Number of records to skip for pagination (default 0)","in":"query","name":"offset","schema":{"type":"integer"}},{"description":"Filter tool calls by MCP session ID","in":"query","name":"session_id","schema":{"type":"string"}}],"responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.GetToolCallsResponse"}}},"description":"Tool calls retrieved successfully"},"401":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Unauthorized - missing or invalid API key"},"405":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Method not allowed"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Failed to get tool calls"}},"security":[{"ApiKeyAuth":[]},{"ApiKeyQuery":[]}],"summary":"Get tool call history","tags":["tool-calls"]}},"/api/v1/tool-calls/{id}":{"get":{"description":"Retrieves detailed information about a specific tool call execution including full request arguments, response data, execution time, and any errors encountered.","parameters":[{"description":"Tool call ID","in":"path","name":"id","required":true,"schema":{"type":"string"}}],"responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.GetToolCallDetailResponse"}}},"description":"Tool call details retrieved successfully"},"400":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Tool call ID required"},"401":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Unauthorized - missing or invalid API key"},"404":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Tool call not found"},"405":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Method not allowed"}},"security":[{"ApiKeyAuth":[]},{"ApiKeyQuery":[]}],"summary":"Get tool call details by ID","tags":["tool-calls"]}},"/api/v1/tool-calls/{id}/replay":{"post":{"description":"Re-executes a previous tool call with optional modified arguments. Useful for debugging and testing tool behavior with different inputs. Creates a new tool call record linked to the original.","parameters":[{"description":"Original tool call ID to replay","in":"path","name":"id","required":true,"schema":{"type":"string"}}],"requestBody":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ReplayToolCallRequest"}}},"description":"Optional modified arguments for replay"},"responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ReplayToolCallResponse"}}},"description":"Tool call replayed successfully"},"400":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Tool call ID required or invalid JSON payload"},"401":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Unauthorized - missing or invalid API key"},"405":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Method not allowed"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Failed to replay tool call"}},"security":[{"ApiKeyAuth":[]},{"ApiKeyQuery":[]}],"summary":"Replay a tool call","tags":["tool-calls"]}},"/api/v1/tools/call":{"post":{"description":"Execute a tool on an upstream MCP server (wrapper around MCP tool calls)","requestBody":{"content":{"application/json":{"schema":{"properties":{"arguments":{"type":"object"},"tool_name":{"type":"string"}},"type":"object"}}},"description":"Tool call request with tool name and arguments","required":true},"responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.SuccessResponse"}}},"description":"Tool call result"},"400":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Bad request (invalid payload or missing tool name)"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/contracts.ErrorResponse"}}},"description":"Internal server error or tool execution failure"}},"security":[{"ApiKeyAuth":[]},{"ApiKeyQuery":[]}],"summary":"Call a tool","tags":["tools"]}},"/healthz":{"get":{"description":"Get comprehensive health status including all component health (Kubernetes-compatible liveness probe)","responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/observability.HealthResponse"}}},"description":"Service is healthy"},"503":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/observability.HealthResponse"}}},"description":"Service is unhealthy"}},"summary":"Get health status","tags":["health"]}},"/readyz":{"get":{"description":"Get readiness status including all component readiness checks (Kubernetes-compatible readiness probe)","responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/observability.ReadinessResponse"}}},"description":"Service is ready"},"503":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/observability.ReadinessResponse"}}},"description":"Service is not ready"}},"summary":"Get readiness status","tags":["health"]}}}, "openapi": "3.1.0" }` diff --git a/oas/swagger.yaml b/oas/swagger.yaml index aace52a4..e0546d69 100644 --- a/oas/swagger.yaml +++ b/oas/swagger.yaml @@ -2182,6 +2182,23 @@ paths: summary: Get activity summary statistics tags: - Activity + /api/v1/annotations/coverage: + get: + description: Reports how many upstream tools have MCP annotations vs don't, + broken down by server + responses: + "200": + content: + application/json: + schema: + $ref: '#/components/schemas/contracts.SuccessResponse' + description: Annotation coverage report + security: + - ApiKeyAuth: [] + - ApiKeyQuery: [] + summary: Get annotation coverage report + tags: + - annotations /api/v1/config: get: description: Retrieves the current MCPProxy configuration including all server diff --git a/specs/035-enhanced-annotations/spec.md b/specs/035-enhanced-annotations/spec.md new file mode 100644 index 00000000..463532dd --- /dev/null +++ b/specs/035-enhanced-annotations/spec.md @@ -0,0 +1,86 @@ +# Spec 035: Enhanced Tool Annotations Intelligence + +## Overview + +Leverage MCP tool annotations for security-aware routing, quarantine protection, session-level risk analysis, and smarter tool discovery filtering. + +## Features + +### F1: Annotation Change Detection in Quarantine +Include tool annotations in the SHA-256 hash used for tool-level quarantine change detection. Detects "annotation rug-pulls" where a server flips `destructiveHint` from true→false to trick agents into using a dangerous tool through `call_tool_read`. + +**Files**: `internal/runtime/tool_quarantine.go` +- Modify `calculateToolApprovalHash()` to include serialized annotations in hash input +- Format: `toolName|description|schemaJSON|annotationsJSON` +- Nil annotations → empty string (backward compatible, won't invalidate existing approvals unless annotations appear) + +### F2: Lethal Trifecta Session Analysis +When `retrieve_tools` is called, analyze ALL connected servers' tool annotations to detect the "lethal trifecta" (Simon Willison's risk model): a session combining (1) access to sensitive/private data, (2) exposure to untrusted content via open-world tools, and (3) ability to write/destroy. + +**Files**: `internal/server/mcp.go` +- Add `analyzeSessionRisk()` method on MCPProxyServer +- Scan all tools across all servers via StateView snapshot +- Classify tools into risk categories based on annotations: + - `has_sensitive`: tools with `readOnlyHint=false` or accessing private data patterns + - `has_open_world`: tools with `openWorldHint=true` (or nil, since default is true) + - `has_destructive`: tools with `destructiveHint=true` (or nil, since default is true) +- Add `session_risk` field to retrieve_tools response: + ```json + { + "session_risk": { + "level": "high|medium|low", + "has_sensitive_data_tools": true, + "has_open_world_tools": true, + "has_destructive_tools": true, + "lethal_trifecta": true, + "warning": "Session has tools that combine private data access, untrusted content, and destructive capabilities" + } + } + ``` + +### F3: openWorldHint Enhanced Scanning +Flag tool call responses from tools with `openWorldHint=true` for enhanced sensitive data scanning. Untrusted content from open-world tools is a primary vector for prompt injection data exfiltration. + +**Files**: `internal/runtime/activity_service.go`, `internal/server/mcp.go` +- In `handleCallToolVariant()` and code_execution handler, check if the called tool has `openWorldHint=true` +- If yes, add metadata tag `"content_trust": "untrusted"` to the activity record +- The sensitive data detector already scans responses; this adds context for audit + +### F4: Annotation-Based Filtering in retrieve_tools +Add optional filter parameters to `retrieve_tools` for agents to self-restrict tool discovery. + +**Files**: `internal/server/mcp.go`, `internal/server/mcp_routing.go` +- New optional parameters: + - `read_only_only` (bool): Only return tools with `readOnlyHint=true` + - `exclude_destructive` (bool): Exclude tools with `destructiveHint=true` or nil + - `exclude_open_world` (bool): Exclude tools with `openWorldHint=true` or nil +- Filter applied after BM25 search, before response building +- Update tool definition in `buildCallToolModeTools()` and `buildCodeExecModeTools()` + +### F5: Annotation Coverage Reporting +REST API endpoint and CLI output showing annotation adoption across connected servers. + +**Files**: `internal/httpapi/server.go`, `internal/server/mcp.go` +- New endpoint: `GET /api/v1/annotations/coverage` +- Response: + ```json + { + "total_tools": 45, + "annotated_tools": 12, + "coverage_percent": 26.7, + "servers": [ + { + "name": "github", + "total_tools": 20, + "annotated": 8, + "coverage_percent": 40.0 + } + ] + } + ``` +- Also add `annotation_coverage` field to retrieve_tools response when `include_stats=true` + +## Testing +- Unit tests for each feature +- E2E test verifying annotation filtering works via MCP protocol +- Verify quarantine hash change detection triggers on annotation changes