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

# cancel_operation

Cancel a running operation.

## TL;DR

* **Use when**: Operation taking too long, no longer needed
* **Returns**: Cancellation status
* **Cost**: No VM needed

## Parameters

| Parameter      | Type   | Required | Default | Description              |
| -------------- | ------ | -------- | ------- | ------------------------ |
| `operation_id` | string | Yes      | -       | Operation UUID to cancel |

## Response

```json theme={null}
{
  "success": true,
  "operation_id": "op-abc123"
}
```

## Examples

### Cancel Operation

```json theme={null}
{"tool": "cancel_operation", "args": {
  "operation_id": "op-abc123"
}}
```

## See Also

* [get\_operation](./get_operation) - Check operation status
* [list\_operations](./list_operations) - Find operations