1. list-calendars
List all available calendars.
2. list-events
List events with date filtering.
3. search-events
Search events by text query.
4. create-event
Create new calendar events.
5. update-event
Update existing events.
6. delete-event
Delete events.
7. get-freebusy
Check availability across calendars, including external calendars.
8. list-colors
List available event colors.