Tools
Tools
Every function the agent can call. Built-ins, integrations, MCP bridge, composers.
Authoring
defineTool(core) — JSON-Schema inference.defineZodTool— Zod-based with runtime validation.composeTool— chain N tools into one macro tool. Recipe.wrapToolWithSelfDebug— LLM-corrected retries. Recipe.createMandatorySandbox— allow / deny / require-sandbox / validators. Recipe.
Built-ins
webSearch · fetchUrl · filesystem · shell
Integrations (20+)
Dev / chat: github · linear · slack · notion · discord
Google: gmail · googleCalendar
Business: stripe · postgres · s3
Scraping: firecrawl · reader · documentParsers
Voice / image: openaiImages · elevenlabs · whisper · deepgram
Data: maps · weather · coingecko
Browser: browserAgent
MCP bridge
createMcpClient+toolsFromMcpClient— consume any MCP server.createMcpServer— publish AgentsKit tools to any MCP host.- Recipe: MCP bridge.
Per-integration pages + authoring deep dives land in step 6 of the docs IA rollout.