[BUG] CCR scheduled triggers fail to load MCP connector tools in unattended runs

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?

Claude.ai connectors attached to a scheduled remote trigger load MCP tools
successfully during manual/test runs but fail with "No MCP tools are loaded
in this session" when the same trigger fires on a cron schedule unattended.

Environment

• Claude Code version: latest
• Platform: macOS
• Trigger type: Scheduled remote trigger (CCR)
• Connectors: Gmail, Google Calendar, Granola, Atlassian (Jira)

## Steps to Reproduce

1. Connect MCP connectors at claude.ai/settings/connectors
2. Create a scheduled trigger via RemoteTrigger API with those connectors

attached in mcp_connections

1. Manually run the trigger (action: "run") — MCP tools load successfully
2. Wait for the cron schedule to fire automatically (unattended)
3. Check run logs — agent reports "No MCP tools are loaded in this session"

What Should Happen?

Expected Behavior

MCP connector tools (Gmail, Calendar, etc.) should load in both manual and
scheduled runs since the same connector UUIDs are used in both cases.

Error Messages/Logs

## Actual Behavior
  Manual/test runs: MCP tools load correctly, agent can call Gmail, Calendar etc.
  Scheduled (cron) runs: "No MCP tools are loaded in this session" — agent sees
  only built-in tools (Bash, Read, Write, etc.)

  ## Hypothesis
  The connector OAuth tokens appear to be scoped to interactive/browser sessions.
  Manual runs piggyback an active user session for token exchange. Scheduled
  unattended runs have no live session and need stored offline refresh tokens —
  these either aren't being stored or weren't granted offline_access scope during
  the connector setup flow.

  ## Additional Observation
  After disconnecting and reconnecting connectors, the schedule skill API
  consistently returns "No connected MCP connectors found" even though connectors
  are visible and active in claude.ai/settings/connectors — suggesting a sync
  lag between the UI and the CCR API layer.

  ## Trigger ID (for investigation)
  trig_01KWr7GFhTDZCopuHZXZ6G8i

Steps to Reproduce

## Steps to Reproduce

1. Connect MCP connectors at claude.ai/settings/connectors
2. Create a scheduled trigger via RemoteTrigger API with those connectors

attached in mcp_connections

1. Manually run the trigger (action: "run") — MCP tools load successfully
2. Wait for the cron schedule to fire automatically (unattended)
3. Check run logs — agent reports "No MCP tools are loaded in this session"

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.89

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_