> ## Documentation Index > Fetch the complete documentation index at: https://docs.prisme.ai/llms.txt > Use this file to discover all available pages before exploring further. # Attach a tool to an agent > Adds a tool to the agent's `tools[]`. `type` MUST be one of `file_search`, `mcp`, or `function`. The tool name must match `^[a-zA-Z0-9_-]+$` (OpenAI tool-name constraint). When the agent is published, `has_draft_changes` is set to `true`. ## OpenAPI ````yaml /api-reference/agent-factory/swagger.yml post /v1/agents/{agentId}/tools openapi: 3.0.3 info: version: 1.0.0 title: Agent Factory API description: | Public REST API for the Agent Factory workspace - agents, conversations, messages, tools, artifacts, sharing, ratings, and discovery. Powered by Prisme.ai's runtime; all endpoints are exposed under each workspace's webhook namespace. contact: name: Prisme.ai url: https://prisme.ai servers: - url: https://{host}/v2/workspaces/slug:agent-factory/webhooks description: Prisme.ai workspace webhooks variables: host: default: api.studio.prisme.ai description: API host (override for self-hosted or sandbox) security: - BearerAuth: [] - OrgApiKeyAuth: [] tags: - name: Agents description: Agent CRUD, discovery, AGENTS.md import/export. - name: Access description: Agent access bindings, sharing, and access requests. - name: ApiKeys description: Agent-scoped API key management (mint, revoke, rotate). - name: Publishing description: Publish or discard draft changes on an agent. - name: Ratings description: User ratings on published agents. - name: Profiles description: >- Agent profiles/presets catalog (simple, workflow, agent_light, agent_full, orchestrator). - name: Activity description: Activity feed for agents (events, errors, lifecycle changes). - name: Analytics description: Agent usage analytics (series + summary). - name: Conversations description: Conversations on an agent (CRUD, archive, star). - name: Messages description: Send messages to an agent (synchronous send + SSE stream). - name: Tasks description: Async task lifecycle (list, fetch, cancel, resolve, subscribe). - name: Artifacts description: Generated artifacts (files, code, content) attached to a task. - name: Shares description: Conversation, message, and artifact share-link snapshots. - name: A2A description: Agent-to-agent JSON-RPC 2.0 gateway (well-known agent.json + RPC). - name: Tools description: Per-agent tool catalogue (system tools, MCP servers, function tools). - name: Retention description: Per-agent and org-wide conversation retention policies. - name: Evaluations description: Agent evaluation runs and results. paths: /v1/agents/{agentId}/tools: post: tags: - Tools summary: Attach a tool to an agent description: | Adds a tool to the agent's `tools[]`. `type` MUST be one of `file_search`, `mcp`, or `function`. The tool name must match `^[a-zA-Z0-9_-]+$` (OpenAI tool-name constraint). When the agent is published, `has_draft_changes` is set to `true`. operationId: addAgentTool parameters: - name: agentId in: path required: true schema: type: string maxLength: 64 requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ToolAddInput' example: type: file_search name: test_file_search description: Test file search tool vector_store_id: vs_test_123 catalog_id: template-file-search responses: '200': description: Tool added. content: application/json: schema: $ref: '#/components/schemas/Tool' '400': description: Validation error (invalid type, bad tool name, missing fields). content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Authentication required. content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Forbidden. content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Agent not found. content: application/json: schema: $ref: '#/components/schemas/Error' '405': description: Method not allowed. content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: A tool with the same name already exists on this agent. content: application/json: schema: $ref: '#/components/schemas/Error' components: schemas: ToolAddInput: type: object required: - type properties: type: type: string enum: - file_search - mcp - function maxLength: 64 name: type: string maxLength: 128 pattern: ^[a-zA-Z0-9_-]+$ display_name: type: string maxLength: 256 description: type: string maxLength: 4096 catalog_id: type: string maxLength: 128 auth: type: object additionalProperties: true icon_url: type: string maxLength: 2048 vector_store_id: type: string maxLength: 128 description: Required for `file_search`. server: type: string maxLength: 2048 description: MCP server URL (for `mcp`). headers: type: object additionalProperties: true scope: type: string maxLength: 256 url: type: string maxLength: 2048 description: Required for `function`. parameters: type: object additionalProperties: true description: JSON Schema describing the function tool's parameters. Tool: type: object description: | Tool entry attached to an agent. Discriminated by `type` - `file_search` (requires `vector_store_id`), `mcp` (uses `server`, `headers`, `scope`), or `function` (uses `url`, `parameters`, `headers`). additionalProperties: true properties: id: type: string type: type: string enum: - file_search - mcp - function name: type: string pattern: ^[a-zA-Z0-9_-]+$ display_name: type: string description: type: string catalog_id: type: string auth: type: object additionalProperties: true icon_url: type: string vector_store_id: type: string description: Required for `file_search`. server: type: string description: MCP server URL (for `mcp`). headers: type: object additionalProperties: true scope: type: string url: type: string description: Required for `function`. parameters: type: object additionalProperties: true description: JSON Schema describing the function tool's parameters. Error: type: object required: - error - message properties: error: type: string description: >- Stable PascalCase or SNAKE_CASE error code (e.g. AgentNotFound, VALIDATION_ERROR, FORBIDDEN, METHOD_NOT_ALLOWED). message: type: string description: Human-readable error message. details: type: object description: Optional structured context for the error. additionalProperties: true securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: JWT description: | User-bound credential carrying an identity: either a session JWT or a user access token (`at:*`) generated from the user settings UI. Send as `Authorization: Bearer `. Org API keys (`iak_*`) are **not** accepted here - they carry no user identity. Use the `x-prismeai-api-key` header instead (see `OrgApiKeyAuth`). OrgApiKeyAuth: type: apiKey in: header name: x-prismeai-api-key description: | Organization API key (`iak_{orgSlug}_{uuid}`). Unlike `Authorization: Bearer`, this credential is **not** tied to a user identity - it is bound to the org and its effective access is defined by the scopes / permission rules attached to it (it can be restricted to a single project, or kept broader). For Agent Factory, these keys can be generated directly from the Agent Factory UI (in addition to the AI Governance settings). Send as `x-prismeai-api-key: iak_...`. ````