[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?

A regression bug keeps popping up in claude.ai/code. I have an API fired routine to interface with a few MCP tools. Every few weeks the same regression bug comes back and the agent claims it doesn't have access to Snowflake,Slack, etc - basically all MCPs and tools. I've explicitly allowed it to use these MCPs, and I'm able to use on claude desktop/CLI, so the credentials are there. Please fix and prevent this regression bug from coming back!!

What Should Happen?

Claude should proceed with the task I've pre-configured.

Error Messages/Logs

I've exhaustively searched for Slack and Snowflake tools using every naming convention I can think of (mcp__Slack__*, mcp__Snowflake__*, slack_*, sql_exec_tool, keyword searches, etc.) and none are found. The deferred tools available in this session are:

Steps to Reproduce

1. create a routine in claude.ai/code with explicit instructions
2. provide it access to any number of MCP tools
3. Either schedule or configure it to be fired by API
4. Observe that it is not able to access MCP tools.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.146

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_