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

[techa501p-hub]

Preflight Checklist

• I have searched existing issues and this hasn't been reported yet
• This is a single bug report (please file separate reports for different bugs)
• 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)

[github-actions]

Found 1 possible duplicate issue:

1. [FEATURE] Gmail MCP Connector: Add gmail_modify_labels tool for archiving, labeling, and inbox management #36547

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
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🤖 Generated with Claude Code

[voltechs]

"It's not a bug!" (said like Arnold: "It's not a tumor!")

This is by design, which is why this feature request exists.

[jordy-dam-inqdo]

Hi, I'm encountering this exact issue in Cowork mode.
When trying to create labels in Gmail via the MCP connector,
I get "requires additional permissions" error and when reconnecting:
This app is blocked
This app tried to access sensitive info in your Google Account. To keep your account safe, Google blocked this access.

The gmail.modify scope is missing, which prevents:

• Creating labels
• Labeling threads
• Automating email organization

This is blocking a key workflow for email cleanup/organization.
Would love to see this fixed!

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.