[BUG] Scheduled Claude Routine stalls on deferred tool schema loading — requires manual input to continue

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 a Claude Routine runs on a schedule, it stalls at ToolSearch calls used to load deferred MCP tool schemas. The session waits indefinitely for a human response before it can continue. In today's run (April 18, 2026), the routine started at 8:41 AM but only completed at 10:12 AM — a 1.5-hour delay — because three separate ToolSearch blocking points required manual "Tool loaded." responses.

What Should Happen?

Expected behavior: Scheduled (unattended) routines should be able to load tool schemas automatically without requiring human input.

Connectors in use: Gmail, Google Drive, Slack

Workaround attempted: Added read-only MCP tools to permissions.allow in .claude/settings.json, but this does not address the schema-loading block.

Error Messages/Logs

Steps to Reproduce

1. Create a Claude Routine with Gmail, Google Drive, and Slack connectors enabled.
2. In the routine's system prompt, reference MCP tools from those connectors.
3. Schedule the routine to run at a fixed time (e.g. 8:35 AM).
4. When the routine runs, it issues ToolSearch calls to load deferred MCP tool schemas.
5. The session blocks at each ToolSearch call, waiting for a human "continue" response.
6. Without manual intervention, the session never proceeds — it stalls indefinitely.

Note: In attended use the session works fine if a human responds at each pause.
The issue is that scheduled/unattended runs cannot provide that response.

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.114 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

Claude Routines (claude.ai) — no terminal