[BUG] Claude for Gmail connector lacks gmail.modify scope — label_thread returns permission error

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?

Problem

The label_thread tool returns a permission error when called via the Gmail connector in Claude Code.

Root Cause

Checking Google Account permissions at myaccount.google.com/permissions shows that "Claude for Gmail" only has:

• View profile info
• Manage drafts and send emails
• View email messages and settings

The gmail.modify scope (required for labeling) is NOT included.

Reconnection Blocked

Attempting to reconnect the Gmail connector shows a hard "This app is blocked" screen from Google with no way to bypass it. There is no "Advanced" / "Proceed anyway" option.

Expected Behavior

The Gmail connector should request the gmail.modify scope so that label_thread and similar write operations work.

Environment

• Claude Code on macOS
• Gmail connector (Claude for Gmail)

What Should Happen?

The Gmail connector should request the gmail.modify scope during OAuth authorization, so that label_thread and other write operations work correctly.

Error Messages/Logs

This connector requires additional permissions. The user needs to reconnect it with the appropriate access.

Steps to Reproduce

1. Set up a scheduled task that calls label_thread via the Gmail connector
2. Run the task
3. Error occurs: "This connector requires additional permissions"
4. Attempt to reconnect the Gmail connector in Claude Code settings
5. Google shows a hard "このアプリはブロックされます" (This app is blocked) screen with no way to proceed

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.569.0(49894a)

Platform

Other

Operating System

macOS

Terminal/Shell

Other

Additional Information

Platform: Claude Code (desktop app, macOS)