# Metric programs: update, delete

URL: /code/mcp/metric/records-update · Id: `page:code/mcp/metric/records-update`

> The Metric Verbs update, delete as MCP do programs, with inputs, result, refusals and an example.

Reference for [Metric](/business/nouns/metric), one group of [Metric programs](/code/mcp/metric).

### Metric.update
Changes the given properties of a Metric. [Verb page](/business/nouns/metric/update?interface=mcp).

```text
do: return await $.Metric.update(input)
```

Emits `Metric.updated`.

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | `string` | Yes | The id of the Metric. |
| `query` | `text` | No | How it is computed. An agent never varies the Metrics it is judged by. Never randomized. |
| `unit` | `string` | No | The unit, such as dollars or percent. |

**Returns**

| Output | Type | Required | Description |
| --- | --- | --- | --- |
| `metric` | [Metric](/business/nouns/metric) | Yes | The Metric. |

**Refuses when**

| Check | Error | Fix | Then call |
| --- | --- | --- | --- |
| The key is valid, but its scopes do not allow this operation. | [`forbidden`](/code/api/errors/forbidden) | Use a key whose scopes cover the operation, or ask an owner of the namespace to grant them. | None. |

**Example**

```json
{
  "name": "do",
  "arguments": {
    "code": "return await $.Metric.update({ id: 'metric_GXFHAlK100', query: 'Example query' })"
  }
}
```

### Metric.delete
Deletes a Metric: a soft delete that keeps its history, undone by `Thing.restore`. [Verb page](/business/nouns/metric/delete?interface=mcp).

```text
do: return await $.Metric.delete(input)
```

Emits `Metric.deleted`.

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | `string` | Yes | The id of the Metric. |

**Returns**

| Output | Type | Required | Description |
| --- | --- | --- | --- |
| `metric` | [Metric](/business/nouns/metric) | Yes | The Metric. |

**Refuses when**

| Check | Error | Fix | Then call |
| --- | --- | --- | --- |
| The key is valid, but its scopes do not allow this operation. | [`forbidden`](/code/api/errors/forbidden) | Use a key whose scopes cover the operation, or ask an owner of the namespace to grant them. | None. |

**Example**

```json
{
  "name": "do",
  "arguments": {
    "code": "return await $.Metric.delete({ id: 'metric_GXFHAlK100' })"
  }
}
```