[BUG] Notion MCP connection lost after first prompt in Cowork - tools unavailable on second message

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 using Claude Desktop with Cowork and the Notion MCP connector, the MCP tools become unavailable after the first prompt in a task/conversation.

First prompt: Notion tools work correctly (e.g., searching pages, updating page titles)
Second prompt onwards: All Notion tools fail with error Error: No such tool available: mcp__[uuid]__notion-update-page

The MCP registry still shows Notion as connected: true, but the actual tools are no longer accessible. The suggest_connectors tool shows Notion as "Connected" with no option to Disconnect/Reconnect.

Notably, this issue does NOT occur on a different MacBook with the same setup - the connection persists across multiple prompts on that machine.

What Should Happen?

The Notion MCP connection should persist throughout the entire task/conversation session. All Notion tools should remain available for subsequent prompts after the first successful use.

Error Messages/Logs

Error: No such tool available: mcp__ca550caf-3b8e-4aed-b8f1-3789b568115f__notion-update-page

Steps to Reproduce

1. Open Claude Desktop with Cowork
2. Start a new task
3. Connect to Notion via MCP (shows as "Connected")
4. Send first prompt that uses Notion tools, e.g.: "Search for a page called TEST in my Notion"
5. Observe: ✅ Works correctly, finds the page
6. Send a second prompt that uses Notion tools, e.g.: "Rename that page to TESTs"
7. Observe: ❌ Fails with error "No such tool available: mcp__[uuid]__notion-update-page"
8. Check MCP registry - still shows connected: true despite tools being unavailable

Workaround: Starting a completely new task allows the first prompt to work again, but the connection is lost again on the second prompt.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude Desktop with Cowork (latest version as of January 2026)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

• This issue is machine-specific: same setup works correctly on another MacBook (connection persists across prompts)
• Similar to GitHub Issue #167 on makenotion/notion-mcp-server, but with the difference that the first prompt always succeeds
• The MCP registry shows connected: true even when tools are unavailable, making it impossible to disconnect and reconnect
• suggest_connectors shows Notion as "Connected" with no Disconnect button available
• Full restart of Claude Desktop does not resolve the issue
• Only workaround is starting a new task for each Notion operation

Related issues:

• https://github.com/makenotion/notion-mcp-server/issues/167
• https://github.com/makenotion/notion-mcp-server/issues/47