---
title: "cancel_shell"
description: "Cancel a pending or ongoing shell command."
sidebarTitle: "cancel_shell"
lastUpdated: "2026-09-23"
---

> **For AI agents:** the complete documentation index is at [llms.txt](/llms.txt). Append `.md` to any page URL for its markdown version.

{/* GENERATED FILE: do not edit by hand. Regenerate with: node scripts/generate.mjs */}

Cancel a pending or ongoing shell command.

<Warning>
  **Destructive · Writes data · Idempotent · Calls external systems.** This tool can modify or delete data. Review the arguments before letting an agent call it.
</Warning>

## Parameters

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `shell_id` | number | Yes | Shell command ID to cancel |

## Example arguments

Illustrative arguments an agent supplies when calling this tool:

```json
{
  "shell_id": 0
}
```

## Description

```text
The command's status changes to Canceled and the runner task is terminated. Find active shell_ids via list_shell_actions.
```

## Related

- [`list_shell_actions`](/mcp/tools/shell/list_shell_actions)

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