cancel-calendar-event
cancel-calendar-eventOrganizers cancel meetings and notify attendees with a custom message. Attendees cannot cancel; they should decline instead.
Instructions
This action allows the organizer of a meeting to send a cancellation message and cancel the event. The action moves the event to the Deleted Items folder. The organizer can also cancel an occurrence of a recurring meeting by providing the occurrence event ID. An attendee calling this action gets an error (HTTP 400 Bad Request), with the following error message: 'Your request can't be completed. You need to be an organizer to cancel a meeting.' This action differs from Delete in that Cancel is available to only the organizer, and lets the organizer send a custom message to the attendees about the cancellation.
š” TIP: Cancels a meeting (organizer only) and sends a cancellation message to all attendees. Body: { Comment (optional string, custom message) }. Use this instead of delete-calendar-event when you want attendees to see 'Canceled' in their calendar. Attendees calling this get HTTP 400 ā they should use decline-calendar-event instead.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| body | Yes | ||
| confirm | No | For destructive operations when the confirm gate is enabled (MS365_MCP_REQUIRE_CONFIRM=true; off by default). Set to true only after the user has explicitly approved this action. When the gate is on, calls without confirm: true return { error: "confirmation_required" } without touching user data. | |
| eventId | Yes | Value for the 'eventId' path segment. Pass it under the name 'eventId', not as 'id'. Use the 'id' field of the event object as returned by Microsoft Graph. | |
| includeHeaders | No | Include response headers (including ETag) in the response metadata | |
| excludeResponse | No | Exclude the full response body and only return success or failure indication |