Set the default calendar ID for operations
List all available calendars
Create a new event in Google Calendar
Retrieve upcoming events from Google Calendar
Get detailed information about a specific event
Update an existing event in Google Calendar
Delete an event from Google Calendar
Find available time slots between events
List all available Gmail labels
List emails from a specific label or folder
Get detailed information about a specific email
Get email by its index from the most recent search results
Send a new email
Create a draft email
Delete or trash an email
Add or remove labels from an email
Google OAuth Client ID
Path to store OAuth tokens
Google OAuth Client Secret
Service account private key
Service account email
Gmail user to impersonate
