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# Set question logic

> Hide a question when conditions are met, or always. Input schema, a tools/call example and an example result.

Source: https://cotlet.dev/docs/mcp/fillout/set_question_logic

Docs sections: [Get started](https://cotlet.dev/docs.md) · [REST API](https://cotlet.dev/docs/api.md) · [MCP](https://cotlet.dev/docs/mcp.md) · [SDKs & CLI](https://cotlet.dev/docs/sdks.md) · [Integrations](https://cotlet.dev/docs/integrations.md)

Hide a question when conditions are met, or always.

Fillout MCP tools: https://cotlet.dev/docs/mcp/fillout.md

MCP tool: `fillout_write → set_question_logic`

Access: write.

Sets the Logic of one question: hide_when conditions on earlier answers or URL parameters, or hide_always for a field that only carries a pre-filled value. It replaces the conditions the question had. Conditions that depend on integration data are not set by this tool. The change reaches respondents only after publish_form, and it is undone by the editor's edit history, so it runs without asking first.

## Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `form_id` | string | yes | Form ID from list_forms. |
| `question_id` | string | yes | Question ID from get_form. |
| `hide_when` | array | no | Conditions as in the editor's Add condition. Each item: source (answer or url_parameter), question_id or name, operator (as the condition editor offers it for that field), value. |
| `hide_always` | boolean | no | Always hide the question. Default: false. |

## tools/call

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "fillout_write",
    "arguments": {
      "operation": "set_question_logic",
      "arguments": {
        "form_id": "rK8mTn4vYb1C",
        "question_id": "q_org_description",
        "hide_when": [
          {
            "source": "answer",
            "question_id": "q_company_type",
            "operator": "is not",
            "value": "Non-profit"
          }
        ]
      }
    }
  }
}
```

## Example response

```json
{
  "content": [
    {
      "type": "text",
      "text": "{ ... same JSON as structuredContent ... }"
    }
  ],
  "structuredContent": {
    "form_id": "rK8mTn4vYb1C",
    "question_id": "q_org_description",
    "hide_always": false,
    "hide_when": [
      {
        "source": "answer",
        "question_id": "q_company_type",
        "operator": "is not",
        "value": "Non-profit"
      }
    ]
  },
  "isError": false
}
```

Previous: [Update question](https://cotlet.dev/docs/mcp/fillout/update_question.md)
Next: [Set page branch](https://cotlet.dev/docs/mcp/fillout/set_page_branch.md)

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