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About Agent Search MCP

Google Cloud managed MCP server for Agent Search. Exact tool names and accessible operations depend on the published server reference and configured Google Cloud permissions.

What you can use it for

  • Perform a search on ingested data in Google owned data stores
  • Perform a conversational search on ingested data in Google owned data stores
  • List the engines (apps) under a collection.
Connection and setup
Hosting
Google-managed remote
Transport
Streamable HTTP
Endpoint
https://discoveryengine.googleapis.com/mcp
Authentication
Google Cloud authentication: OAuth 2.0 using Application Default Credentials (ADC) in supported Google clients, or a client OAuth ID/secret or bearer token in compatible third-party clients. The principal needs mcp.tools.call plus the underlying product permissions; API key authentication is only available for services that explicitly support it.

Requirements

  • A Google Cloud project and access to the target product/resource.
  • Enable this MCP service and its underlying Google Cloud API as required by the product guide.
  • An MCP client that supports Streamable HTTP.
  • An identity with the MCP Tool User role (roles/mcp.toolUser) or equivalent mcp.tools.call permission, plus permissions for the underlying product operations.

Setup steps

  1. Choose the correct global or regional endpoint for your data location; this catalog lists the documented endpoint.
  2. In the Google Cloud project, enable the MCP service and the underlying product API if the product guide requires it.
  3. Authenticate the client with Google Cloud ADC (simplest with Antigravity/Gemini CLI) or configure OAuth 2.0 credentials in a compatible client.
  4. Grant the connecting identity roles/mcp.toolUser and only the product IAM roles needed for the intended operations.
  5. Add discoveryengine.googleapis.com to the client as a Streamable HTTP MCP server and complete sign-in.
  6. Refresh the client tool list and check that the tools match the product reference; availability may depend on permissions and selected toolset.
Tools 3

Three read/search tools list engines, search ingested enterprise data and perform conversational search. Results may contain customer-indexed content and can include summaries/citations; scope and serving configuration determine accessible corpora. Requires Google Cloud auth and service permissions.

  • search

    Perform a search on ingested data in Google owned data stores

    01
  • conversational_search

    Perform a conversational search on ingested data in Google owned data stores

    02
  • list_engines

    List the engines (apps) under a collection.

    03
Original sources
  • official server catalog

    Official Google Cloud catalog lists this product as an available remote MCP server.

  • official setup guide

    Google Cloud describes remote MCP client setup, Streamable HTTP transport, supported authentication options, and ADC setup.

  • official authentication guide

    Google documents supported identity types and authorization requirements for Google Cloud MCP calls.

  • official source

    Official Google Cloud primary MCP documentation checked 2026-10-28.

  • official source

    Official Google Cloud primary MCP documentation checked 2026-10-28.

  • official source

    Official Google Cloud primary MCP documentation checked 2026-10-28.

Documentation checked 2026-10-28. Connection has not been runtime tested.

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