Set question logic
Hide a question when conditions are met, or always.
MCP tool fillout_write → set_question_logic
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 | Description |
|---|---|---|
| form_id string required | string | Form ID from list_forms. |
| question_id string required | string | Question ID from get_form. |
| hide_when array | array | 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 | boolean | Always hide the question. Default: false. |
tools/call
{
"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
{
"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
}