Allow `allowed_tools` for MCP function calling

[Khalidzo]

Hey there, I'm using Gemini's SDK with an MCP server and noticed there's no way to restrict which tools the model can call. Currently, I'm doing:

GenerateContentConfig(
    system_instruction=system_message,
    temperature=0,
    tools=[mcp_client.session],
)

This gives access to all tools, but I'd like to allow only specific one, similar to allowed_tools in OpenAI's or Anthropic's SDKs. Would be great to have something like:

tools=[mcp_client.session.with_allowed_tools(["tool_a", "tool_b"])]

Thanks in advance!

[gmKeshari]

Hi @Khalidzo,
Thank you for your feedback. We appreciate you taking the time to share your thoughts with us, and we'll be filing a feature request.

[a2105z]

I'd like to work on this — planning to add a way to restrict which MCP tools are available (similar to allowed_tools in other SDKs).