Deletes an access control rule from a Google Calendar. Use when you need to remove sharing permissions for a user, group, or domain.

Retrieves a specific access control rule for a calendar. Use when you need to check permissions for a specific user, group, or domain.

Creates an access control rule for a calendar. Use when you need to grant sharing permissions to a user, group, or domain.

Retrieves the list of access control rules (ACLs) for a specified calendar, providing the necessary 'rule_id' values required for updating specific ACL rules.

Updates an existing access control rule for a calendar using patch semantics (partial update). This allows modifying specific fields without affecting other properties. IMPORTANT: The ACL rule must already exist on the calendar. This action cannot create new rules. If you receive a 404 Not Found error, the rule does not exist - use ACL insert to create it first, or use ACL list to verify available rules. Each patch request consumes three quota units. For domain-type ACL rules, if PATCH fails with 500 error, this action will automatically fallback to UPDATE method.

Updates an access control rule for the specified calendar.

Tool to watch for changes to ACL resources. Use when you need to set up real-time notifications for access control list modifications on a calendar.

Execute up to 1000 event mutations (create/patch/delete) in one Google Calendar HTTP batch request with per-item status/results. Use this to materially reduce round-trips for bulk operations like migrations, cleanup, or large-scale updates.

Tool to remove a calendar from the user's calendar list. Use when you need to unsubscribe from or hide a calendar from the user's list.

Retrieves metadata for a SINGLE specific calendar from the user's calendar list by its calendar ID. This action requires a calendarId parameter and returns details about that one calendar only. NOTE: This does NOT list all calendars. To list all calendars in the user's calendar list, use GOOGLECALENDAR_CALENDAR_LIST_LIST instead.

Inserts an existing calendar into the user's calendar list, making it visible in the UI. Calendars (e.g., newly created ones) won't appear in the list or UI until explicitly inserted.

Updates an existing calendar on the user's calendar list using patch semantics. This method allows partial updates, modifying only the specified fields.

Updates a calendar list entry's display/subscription settings (color, visibility, reminders, selection) for the authenticated user — does not modify the underlying calendar resource (title, timezone, etc.). To modify the calendar itself, use GOOGLECALENDAR_CALENDARS_UPDATE.

Watch for changes to CalendarList resources using push notifications. Use this to receive real-time updates when calendar list entries are modified.

Deletes a secondary calendar that you own or have delete permissions on. Deletion is permanent and irreversible — verify the correct calendar_id before calling. You cannot delete your primary calendar or calendars you only have read/write access to. Use calendarList.list to find calendars with owner accessRole. For primary calendars, use calendars.clear instead. Parallel calls may trigger userRateLimitExceeded; sequence bulk deletions.

Full PUT-style update that overwrites all calendar metadata fields; unspecified optional fields are cleared. Use GOOGLECALENDAR_PATCH_CALENDAR to update only a subset of fields. Mutates the underlying calendar resource (title, description, timeZone, etc.); use GOOGLECALENDAR_CALENDAR_LIST_UPDATE to change per-user display properties like color.

Tool to stop watching resources through a notification channel. Use when you need to discontinue push notifications for a specific channel subscription.

Clears a primary calendar by deleting all events from it. The calendar itself is preserved; only its events are removed. Primary calendars cannot be deleted entirely.

Returns the color definitions for calendars and events. Use when you need to retrieve the available color palette for styling calendars or events.

Creates a new secondary Google Calendar with the specified title and optional settings. Use this action when you need to create a new calendar for organizing events separately from the primary calendar. The authenticated user becomes the owner of the newly created calendar. Optional parameters include description, location, and timezone.

Creates a timed event using start_datetime and either end_datetime or duration fields, or an all-day event using an inclusive start_date and exclusive end_date. send_updates defaults to "all", which emails all attendees; choose "externalOnly" or "none" to control notifications. The organizer is added as an attendee unless exclude_organizer is true, and a Google Meet link is requested by default. No conflict checking is performed; use GOOGLECALENDAR_FREE_BUSY_QUERY first when conflicts matter. Returns the created event under response_data.

Deletes an event from the specified calendar. Only Google's HTTP 204 confirms deletion; 404 or 410 can also mean the event belongs to a different calendar. Bulk deletions may trigger `rateLimitExceeded` or `userRateLimitExceeded`; cap concurrency to 5–10 requests and apply exponential backoff.

Creates a new, empty Google Calendar with the specified title (summary). Newly created calendars default to UTC timezone; use GOOGLECALENDAR_PATCH_CALENDAR afterward to set the desired timeZone if needed.

Retrieves a SINGLE event by its unique event_id (REQUIRED). This action does NOT list or search events - it fetches ONE specific event when you already know its ID. If you want to list events within a time range, search for events, or filter by criteria like time_min/time_max, use GOOGLECALENDAR_EVENTS_LIST instead.

Tool to import an event as a private copy to a calendar. Use when you need to add an existing event to a calendar using its iCalUID. Only events with eventType='default' can be imported.

Returns instances of the specified recurring event. Use timeMin/timeMax to constrain the window; omitting bounds can return large result sets and is quota-heavy. On high-volume calls, 403 rateLimitExceeded or 429 too_many_requests may occur; apply exponential backoff (1s, 2s, 4s) before retrying.

Lists or incrementally synchronizes events from one calendar, defaulting to the connected user's primary calendar. Use timeMin/timeMax for a time window, singleEvents to expand recurring series, showDeleted to include cancelled events, query for text search, orderBy to sort, pageToken to continue a page sequence, and syncToken to retrieve changes after a completed full sync. A sync token cannot be combined with event, text, property, time, update-time, or ordering filters; keep other parameters unchanged across sync pages. The final page returns nextSyncToken, and an expired token requires a new full sync after Google returns HTTP 410. Use fields to request a smaller partial response, including continuation tokens needed by the workflow.

Return a unified event list across all calendars in the user's calendar list for a given time range. Use when you need a single view of all events across multiple calendars. An inverted or incorrect time range silently returns empty results rather than an error. An empty `items` list means no events matched the filters—adjust `time_min`, `time_max`, or `q` before concluding no events exist.

Moves an event to another calendar, i.e., changes an event's organizer.

Watch for changes to Events resources. Watch channels expire; persist the channel `id` per `calendarId` to re-establish watches after expiration or restarts.

Finds events in a specified Google Calendar using text query, time ranges (event start/end, last modification), and event types. Ensure `timeMin` is not chronologically after `timeMax` if both are provided. Results may span multiple pages; always follow `nextPageToken` until absent to avoid silently missing events. Validate the correct match from results by checking summary, start.dateTime, and organizer.email before using event_id for mutations. An empty `items` array means no events matched — widen filters rather than treating it as an error.

Finds both free and busy time slots in Google Calendars for specified calendars within a defined time range. If `time_min` is not provided, defaults to the current timestamp in the specified timezone. If `time_max` is not provided, defaults to 23:59:59 of the day specified in `time_min` (if provided), otherwise defaults to 23:59:59 of the current day in the specified timezone. Returns busy intervals and calculates free slots by finding gaps between busy periods; `time_min` must precede `time_max` if both are provided. This action retrieves free and busy time slots for the specified calendars over a given time period. It analyzes the busy intervals from the calendars and provides calculated free slots based on the gaps in the busy periods. Returned free slots are unfiltered by duration; callers must filter intervals to those fully containing the required meeting length. No event metadata (titles, descriptions, links) is returned; use GOOGLECALENDAR_EVENTS_LIST for event details.

Queries raw busy intervals for one or more calendars or groups over an exact time range. Returns per-calendar and per-group availability and errors, without event titles or details. Use GOOGLECALENDAR_FIND_FREE_SLOTS when you want default time bounds and computed free intervals; use GOOGLECALENDAR_EVENTS_LIST when you need event records.

Gets canonical metadata for one Google Calendar, defaulting to the authenticated user's primary calendar. Returns its identifier, title, description, location, time zone, and conference properties. Use GOOGLECALENDAR_CALENDAR_LIST_GET for one calendar's user-specific list settings such as access role, color, visibility, selection, and default reminders; use GOOGLECALENDAR_LIST_CALENDARS to enumerate accessible calendars.

DEPRECATED: Use CalendarListGet instead. Tool to retrieve the authenticated user's primary calendar profile. Use when you need to get information about the user's main calendar, including timezone, settings, and preferences.

Gets the current date and time, allowing for a specific timezone offset. Call this tool first before computing relative dates (e.g., 'tomorrow', 'next Monday') to avoid off-by-one-day errors across timezones.

Identifies the Google user connected to Calendar from the primary calendar resource. Returns the account identifier, email when available, display name, timezone, and primary calendar ID. This is Calendar identity metadata, not a full Google Account or People profile.

Lists all buildings for a Google Workspace customer account with full details including addresses, coordinates, and floor names. Use this action when you need to retrieve the complete list of physical building locations configured in Google Workspace Calendar resources. This is useful for workspace administrators managing conference room and resource scheduling across multiple office buildings. Requires Google Workspace administrator privileges with Directory API access.

Retrieves calendar resources (such as conference rooms) from a Google Workspace domain using the Admin SDK Directory API. Use this action when you need to list available meeting rooms, conference spaces, or other bookable calendar resources in an organization. The action supports filtering by resource category, capacity, building location, and other criteria. IMPORTANT: This requires Admin SDK Directory API access and appropriate admin permissions - it is NOT available for personal Gmail accounts, only Google Workspace domains.

Lists calendars accessible through the connected user's CalendarList, returning IDs and user-specific metadata such as access role, color, visibility, selection, and reminders. Hidden calendars are omitted unless show_hidden is true; min_access_role and show_deleted provide additional filtering. Continue with page_token until next_page_token is absent; for incremental synchronization, pass next_sync_token back as sync_token. Use returned IDs, not display names, with event actions, and use GOOGLECALENDAR_GET_CALENDAR for canonical metadata about one known calendar.

DEPRECATED: Use GOOGLECALENDAR_SETTINGS_LIST instead. Tool to return all user settings for the authenticated user. Use when you need to retrieve calendar settings.

Partially updates (PATCHes) an existing Google Calendar, modifying only the fields provided. At least one of summary, description, location, or timezone must be provided. Empty strings for `description` or `location` clear them.

Update specified fields of an existing event in a Google Calendar using patch semantics (array fields like `attendees` are fully replaced if provided); ensure the `calendar_id` and `event_id` are valid and the user has write access to the calendar.

Parses natural language text to quickly create a basic Google Calendar event with its title, date, and time, suitable for simple scheduling; does not support direct attendee addition or recurring events, and `calendar_id` must be valid if not 'primary'.

Removes an attendee from a specified event in a Google Calendar; the calendar and event must exist. Concurrent calls on the same event can overwrite attendee lists — apply changes sequentially per event.

Tool to return a single user setting for the authenticated user. Use when you need to retrieve a specific calendar setting value.

Returns all user settings for the authenticated user. Results include multiple settings keyed by id (e.g., `timeZone`); locate a specific setting by its `id` field. `timeZone` values are IANA identifiers (e.g., `America/New_York`) — use directly in datetime and event logic; align with `timeZone` from GOOGLECALENDAR_GET_CALENDAR for consistent notification times.

Watch for changes to Settings resources.

DEPRECATED: Use GOOGLECALENDAR_EVENTS_LIST instead. EventsList already handles syncToken with automatic param stripping. Synchronizes Google Calendar events, performing a full sync if no `sync_token` is provided or if a 410 GONE error (due to an expired token) necessitates it, otherwise performs an incremental sync for events changed since the `sync_token` was issued.

Updates an existing event in Google Calendar. REQUIRES event_id - you MUST first search for the event using GOOGLECALENDAR_FIND_EVENT or GOOGLECALENDAR_EVENTS_LIST to obtain the event_id. This is a full PUT replacement: omitted fields (including attendees, reminders, recurrence, conferencing) are cleared. Always provide the complete desired event state. Use GOOGLECALENDAR_PATCH_EVENT instead for partial edits.