[BUG]

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

search_threads on the Gmail MCP (gmail.mcp.claude.com) returns "Tool execution failed" for every query, including the most basic ones like in:inbox with maxResults: 1. This has persisted across multiple sessions, a full Claude Code restart, and a Gmail connector disconnect/reconnect.

label_thread and unlabel_thread continue to work fine on the same connection, so it's not an auth or connectivity issue — it appears specific to the search endpoint.

Steps to reproduce:

Environment: Claude Code desktop app, macOS, Gmail MCP server gmail.mcp.claude.com

What Should Happen?

Should connect to Gmail MCP

Error Messages/Logs

Steps to Reproduce

Connect Gmail MCP via claude.ai integrations
Call search_threads with any query (e.g. in:inbox, hello)
Tool returns "Tool execution failed. You can try again." every time
Expected: Search results returned
Actual: Consistent failure

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Version: 2.1.181

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_