> ## Documentation Index
> Fetch the complete documentation index at: https://docs.macro.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ListCalendars

> List the calendars the user can see across their connected inboxes, with each calendar's `calendarId`, display name, owning inbox address, and whether it is primary and writable.  Use this before CreateCalendarEvent when the user wants an event on a specific non-default calendar (e.g. "add it to my work calendar") so you can pass the exact `calendarId`. Most users have a single primary calendar, in which case CreateCalendarEvent targets it by default and you do not need this tool. An empty result means no calendar is connected.

# ListCalendars

List the calendars the user can see across their connected inboxes, with each calendar's `calendarId`, display name, owning inbox address, and whether it is primary and writable.

Use this before CreateCalendarEvent when the user wants an event on a specific non-default calendar (e.g. "add it to my work calendar") so you can pass the exact `calendarId`. Most users have a single primary calendar, in which case CreateCalendarEvent targets it by default and you do not need this tool. An empty result means no calendar is connected.