# InteractionRejectToolCallRequest

Rejects a tool call that is waiting for a person's approval: the call does not run, and the agent is told why.

**Kind:** an object, used in requests.

## Fields

| Field | Type | Required | Description |
|---|---|---|---|
| `toolCallApprovalId` | `uuid` | yes | The `id` of the run's `pendingApproval`. Constraints: required (empty or whitespace-only strings are rejected). |
| `reason` | `string` | yes | Why the call was rejected. The agent reads it in place of the call's result. Constraints: required (empty or whitespace-only strings are rejected). |

## Example

```json
{
  "toolCallApprovalId": "3f2b8c1e-5d4a-4e6b-9c7d-2a1b0c9d8e7f",
  "reason": "..."
}
```

## Where it's used

- [`interactionRuns.reject`](https://docs.maitento.com/reference/api/interaction-runs.md) (`POST /interactions/processes/by-id/{id}/reject`)