# revert

> Talos next · Since next

Undo one of your changes as a new revert change.

Refused stale-version if what it touched changed since, not-yours for another's. activity lists yours under mine.

| | |
|---|---|
| Title | Revert a change |
| Mode | `service` |
| Token cost | about 110 tokens (in the default list, paid on every call) |
| Toolset | core |

## Arguments

| Argument | Type | Required | Default | Allowed values | Description |
|---|---|---|---|---|---|
| `agent` | `string` | no |  |  | The name of the agent making the call, when several agents share one connection: each named agent is its own actor and plays its own game. Leave it out when there is one agent. |
| `changeId` | `string` | yes |  |  | A changeId a write of yours answered |

## Example

An MCP `tools/call` with the required arguments (placeholders in angle brackets).

```json
{
  "name": "revert",
  "arguments": {
    "changeId": "<changeId>"
  }
}
```