# What this caller gets on a board

The CALLER's own two lists for one custom board: the columns whose cells will be stripped out of the rows they are served, and the columns their writes will be refused on. Any board reader may ask, and asking once is how a grid greys a cell out instead of drawing an empty one. It is an ANSWER, never the enforcement — the stripping and the refusals happen regardless.

Access class: `board:read`.

## Endpoint

`GET /v1/boards/{id}/column-policies/effective`

## Parameters

| Name | In | Type | Required |
| --- | --- | --- | --- |
| id | path | string | Yes |
| body | query | null | No |
| params | query | object | No |
| query | query | object | No |

## Responses

### 200

the action's answer

Content type: `application/json`.

```json
{
  "data": {
    "hidden": [
      "string"
    ],
    "readOnly": [
      "string"
    ]
  }
}
```

### default

a refusal: `{"error": "<what a person needs to read>"}`. 401 no credential, 402 the plan does not include this, 403 the seat does not, 404 the thing does not exist or is not yours to see.

Content type: `application/json`.

```json
{
  "error": "string"
}
```