# Candidate programs: screen

URL: /code/mcp/candidate/verbs · Id: `page:code/mcp/candidate/verbs`

> The Candidate Verbs screen as MCP do programs, with inputs, result, refusals and an example.

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

### Candidate.screen
Screen asks a Candidate only what the Opening’s Hypothesis still lacks, in writing, and grades each answer as Evidence. [Verb page](/business/nouns/candidate/screen?interface=mcp).

```text
do: return await $.Candidate.screen(input)
```

Emits [`Candidate.screened`](/business/events/Candidate.screened).

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `candidate` | [Candidate](/business/nouns/candidate) | Yes | The Candidate to screen. |

**Returns**

| Output | Type | Required | Description |
| --- | --- | --- | --- |
| `candidate` | [Candidate](/business/nouns/candidate) | Yes | The Candidate, with graded Evidence attached. |

**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 $.Candidate.screen({ candidate: 'candidate_CR5hpwMwhW' })"
  }
}
```