docs(mcp): add guide for exposing an agent as an MCP server#1981
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What
Adds a documentation page, "Expose an ADK agent as an MCP server", covering the
to_mcp_serverfunction, and wires it into the MCP section of the site navigation.Why
to_mcp_serveris the MCP counterpart ofto_a2a: it turns a whole ADK agent into a standard MCP server so hosts like Claude Code or an IDE can drive it as a single tool. The A2A twin already has a full "exposing" quickstart on the site, but there was no page forto_mcp_server, so the feature was effectively undocumented for users who look at the docs site rather than the source tree.This addresses google/adk-python#6417 ("No proper documentation for agent to mcp with release 2.5.0").
Details
docs/mcp/expose-agent-as-mcp-server.md.mkdocs.yml.to_mcp_server(agent, *, name=None, instructions=None, runner=None) -> FastMCPand mirrors the existing in-repo guide atgoogle/adk-python:docs/guides/tools/mcp_tool/agent_to_mcp/index.md. It covers a runnable stdio example, how it works (Runner-backed handler, progress notifications, content mapping), session continuity, the configuration options, serving over streamable-http, and the current limitations.I do not have mkdocs installed locally, so I validated link targets and the nav entry by hand and am relying on CI for the strict build.