Cancel a tag operation

Request cancellation of an in-progress bulk tag operation. Cancellation is cooperative: the operation finishes the page it is currently processing, then stops. Work already committed before cancellation is preserved.<br><br>Cancellation is not a rollback — it stops further work but does not remove assignments the operation already created. To remove assignments, use the bulk-delete endpoint. An operation that has already finished cannot be cancelled.<br><br>This endpoint does not cost any credits to execute.