List all calendars for the authenticated user.
Get details of a specific calendar.
List events in a calendar.
Get details of a specific event.
Create a new calendar event.
Update an existing calendar event.
Delete a calendar event.
List attendees for a specific event.
Create an event using natural language text (e.g., 'Dinner with John tomorrow at 7pm').
Create a new Google Calendar.
Delete a Google Calendar (cannot delete primary calendar).