> ## Documentation Index > Fetch the complete documentation index at: https://openworklabs.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # List tools exposed by an External MCP Connection > Admin-only. Uses the connection credential owned by Den to read its live MCP tools/list catalog. Credentials and tool calls are never returned. ## OpenAPI ````yaml /openapi.json get /v1/mcp-connections/{connectionId}/tools openapi: 3.1.0 info: title: Den API description: >- OpenAPI spec for the Den control plane API. Authentication: - Use `Authorization: Bearer ` for user-authenticated routes that require a Den session. - Use `x-api-key: ` for API-key-authenticated routes that accept organization API keys. - Public routes like health and documentation do not require authentication. Swagger tip: use the security schemes in the Authorize dialog to set either `bearerAuth` or `denApiKey` before trying protected endpoints. version: dev servers: [] security: [] tags: - name: System description: Service health and operational routes. - name: Organizations description: Top-level organization creation and context routes. - name: Invitations description: Invitation preview, acceptance, creation, and cancellation routes. - name: API Keys description: Organization API key management routes. - name: SCIM description: Organization SCIM connector management routes. - name: SSO description: Organization single sign-on connector management routes. - name: Members description: Organization member management routes. - name: Roles description: Organization custom role management routes. - name: Teams description: Organization team management routes. - name: Templates description: Organization shared template routes. - name: LLM Providers description: Organization LLM provider catalog, configuration, and access routes. - name: Skills description: Organization skill authoring and sharing routes. - name: Skill Hubs description: Organization skill hub management and access routes. - name: Workers description: Worker lifecycle, billing, and runtime routes. - name: Worker Runtime description: Worker runtime inspection and upgrade routes. - name: Worker Activity description: Worker heartbeat and activity reporting routes. - name: Telemetry description: Telemetry event ingestion and adoption analytics. - name: Admin description: Administrative reporting routes. - name: Users description: Current user and membership routes. - name: Bootstrap description: Agent-first provisional workspace setup routes. paths: /v1/mcp-connections/{connectionId}/tools: get: tags: - Capability Sources summary: List tools exposed by an External MCP Connection description: >- Admin-only. Uses the connection credential owned by Den to read its live MCP tools/list catalog. Credentials and tool calls are never returned. operationId: getV1McpConnectionsByConnectionIdTools parameters: - in: path name: connectionId schema: format: typeid type: string minLength: 30 maxLength: 30 pattern: ^emc_.* required: true description: Den TypeID with 'emc_' prefix and a 26-character base32 suffix. responses: '200': description: External MCP tool catalog. content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionToolListResponse' '401': description: The caller must be signed in. content: application/json: schema: $ref: '#/components/schemas/UnauthorizedError' '403': description: Only workspace owners and admins can inspect MCP tools. content: application/json: schema: $ref: '#/components/schemas/ForbiddenError' '404': description: Unknown connection. content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionNotFoundError' '409': description: The connection has no usable credential for this member. content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionNotReadyError' '502': description: The upstream MCP tool catalog could not be read. content: application/json: schema: $ref: '#/components/schemas/ExternalMcpConnectionToolListFailedError' components: schemas: ExternalMcpConnectionToolListResponse: type: object properties: tools: type: array items: $ref: '#/components/schemas/ExternalMcpConnectionTool' required: - tools UnauthorizedError: type: object properties: error: type: string const: unauthorized required: - error ForbiddenError: type: object properties: error: type: string enum: - forbidden - reauth reason: type: string message: type: string required: - error ExternalMcpConnectionNotFoundError: type: object properties: error: type: string const: connection_not_found message: type: string required: - error - message ExternalMcpConnectionNotReadyError: type: object properties: error: type: string const: connection_not_ready message: type: string required: - error - message ExternalMcpConnectionToolListFailedError: type: object properties: error: type: string const: tool_catalog_failed message: type: string diagnostic: $ref: '#/components/schemas/ExternalMcpDiagnostic' required: - error - message - diagnostic ExternalMcpConnectionTool: type: object properties: name: type: string title: type: string description: type: string inputSchema: type: object propertyNames: type: string additionalProperties: {} outputSchema: type: object propertyNames: type: string additionalProperties: {} annotations: $ref: '#/components/schemas/ExternalMcpConnectionToolAnnotations' required: - name - inputSchema ExternalMcpDiagnostic: type: object properties: referenceId: type: string phase: type: string enum: - CONFIGURATION - NETWORK_DNS - NETWORK_TCP - NETWORK_TLS - HTTP_ROUTING - AUTH_RESOURCE_DISCOVERY - AUTH_ISSUER_DISCOVERY - AUTH_CLIENT_REGISTRATION - AUTH_USER_OR_WORKLOAD - AUTH_TOKEN_ACQUISITION - AUTH_RESOURCE_VALIDATION - MCP_TRANSPORT - MCP_VERSION - MCP_INITIALIZE - MCP_INITIALIZED - MCP_TOOL_DISCOVERY - MCP_TOOL_EXECUTION - PROVIDER_AUTHORIZATION - PROVIDER_EXECUTION - CONTINUITY_REFRESH - CONTINUITY_SESSION - SHUTDOWN category: type: string code: type: string highestPassed: type: string enum: - configured - reachable - authorized - protocol_ready - catalog_ready - operation_ready retryable: type: boolean actionOwner: type: string enum: - openwork - network_admin - provider_admin - organization_admin - member operatorAction: type: string message: type: string httpStatus: type: integer minimum: 100 maximum: 599 operationPhase: type: string enum: - CONFIGURATION - NETWORK_DNS - NETWORK_TCP - NETWORK_TLS - HTTP_ROUTING - AUTH_RESOURCE_DISCOVERY - AUTH_ISSUER_DISCOVERY - AUTH_CLIENT_REGISTRATION - AUTH_USER_OR_WORKLOAD - AUTH_TOKEN_ACQUISITION - AUTH_RESOURCE_VALIDATION - MCP_TRANSPORT - MCP_VERSION - MCP_INITIALIZE - MCP_INITIALIZED - MCP_TOOL_DISCOVERY - MCP_TOOL_EXECUTION - PROVIDER_AUTHORIZATION - PROVIDER_EXECUTION - CONTINUITY_REFRESH - CONTINUITY_SESSION - SHUTDOWN outbound: type: object properties: origin: type: string pathHash: type: string required: - origin - pathHash providerRequestId: type: string jsonRpcCode: type: integer minimum: -9007199254740991 maximum: 9007199254740991 required: - referenceId - phase - category - code - highestPassed - retryable - actionOwner - operatorAction - message ExternalMcpConnectionToolAnnotations: type: object properties: title: type: string readOnlyHint: type: boolean destructiveHint: type: boolean idempotentHint: type: boolean openWorldHint: type: boolean ````