[MCP] Calendar events.list returns "Not Found" for shared/group calendars

[chrisblattman]

Problem

When using gws mcp in compact mode, calendar events.list works correctly for the primary calendar (primary or the user's email) but returns Not Found for shared/group calendar IDs.

Steps to reproduce

// This works:
{
  "resource": "events",
  "method": "list",
  "params": {
    "calendarId": "primary",
    "timeMin": "2026-03-07T00:00:00-06:00",
    "timeMax": "2026-03-08T00:00:00-06:00",
    "singleEvents": true,
    "orderBy": "startTime"
  }
}

// This returns "Not Found":
{
  "resource": "events",
  "method": "list",
  "params": {
    "calendarId": "abc123@group.calendar.google.com",
    "timeMin": "2026-03-07T00:00:00-06:00",
    "timeMax": "2026-03-08T00:00:00-06:00",
    "singleEvents": true,
    "orderBy": "startTime"
  }
}

The same group calendar IDs work correctly when accessed through the Google Calendar API directly (via other clients using the same OAuth credentials and scopes).

Environment

• gws v0.7.0
• macOS, compact MCP mode
• OAuth scopes include https://www.googleapis.com/auth/calendar.readonly

Expected behavior

Shared/group calendars that the authenticated user has access to should be queryable, consistent with the Google Calendar API's behavior.