Gmail MCP connector: label_thread blocked by Google OAuth insufficient scopes

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?

When trying to connect Gmail connector with write permissions (label_thread), Google shows "האפליקציה הזו חסומה" (This
app is blocked).

The connector works for read-only tools but label_thread and label_message fail with "Request had insufficient
authentication scopes" even after reconnecting.

Steps to reproduce:

1. Connect Gmail connector in claude.ai
2. Try to use label_thread tool
3. Error: "insufficient authentication scopes"
4. Try to reconnect → Google blocks the app entirely

ב-"What Should Happen?":
Gmail write tools (label_thread, label_message) should work after connecting the Gmail connector.

What Should Happen?

When trying to connect Gmail connector with write permissions (label_thread), Google shows "האפליקציה הזו חסומה" (This
app is blocked).

The connector works for read-only tools but label_thread and label_message fail with "Request had insufficient
authentication scopes" even after reconnecting.

Steps to reproduce:

1. Connect Gmail connector in claude.ai
2. Try to use label_thread tool
3. Error: "insufficient authentication scopes"
4. Try to reconnect → Google blocks the app entirely

ב-"What Should Happen?":
Gmail write tools (label_thread, label_message) should work after connecting the Gmail connector.

Error Messages/Logs

When trying to connect Gmail connector with write permissions (label_thread), Google shows "האפליקציה הזו חסומה" (This
   app is blocked).

Steps to Reproduce

When trying to connect Gmail connector with write permissions (label_thread), Google shows "האפליקציה הזו חסומה" (This
app is blocked).

The connector works for read-only tools but label_thread and label_message fail with "Request had insufficient
authentication scopes" even after reconnecting.

Steps to reproduce:

1. Connect Gmail connector in claude.ai
2. Try to use label_thread tool
3. Error: "insufficient authentication scopes"
4. Try to reconnect → Google blocks the app entirely

ב-"What Should Happen?":
Gmail write tools (label_thread, label_message) should work after connecting the Gmail connector.

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

N/A - claude.ai web

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

na