---
title: brand_detach_advertiser
description: Remove the link between an ad account and a brand, leaving the brand and its context untouched.
---

Removes the link between an **ad account** and a brand, so [`brand_resolve`](/mcp/tools/brand-resolve) on that account stops returning this brand's context.

Only the link goes. The brand, everything written on it, and its files are untouched — and any other account attached to the same brand is unaffected.

## Input

| Field           | Type     | Required | Description                  |
| --------------- | -------- | -------- | ---------------------------- |
| `brand_name`    | `string` | yes      | The brand slug.              |
| `advertiser_id` | `string` | yes      | The ad account id (`acc_…`). |

The same two fields [`brand_attach_advertiser`](/mcp/tools/brand-attach-advertiser) takes — see that page for how accounts and brands relate, including the fact that one account can belong to several brands.

Requires the `brand:write` scope.

## Reference

Detach an ad account from a brand. The brand itself and its context are untouched — only the link goes.

### Input

| Argument | Type | Required | Description |
| --- | --- | --- | --- |
| `advertiser_id` | string | yes | The ad account id (`acc_…`). Discover ids with list_advertisers. |
| `brand_name` | string | yes | The brand slug. |

### Failure codes

A failed call has `isError` set, and `structuredContent.error` holds one of these codes. [Errors](/mcp/errors) describes the shape of a failed call.

- `not_found`
- `advertiser_not_owned`
- `not_attached`
- `forbidden`
- `invalid_request`
- `internal_error`

### Scope

The token must hold `brand:write`. [Auth & scopes](/mcp/auth) lists each scope.

### Annotations

A client reads these hints. A hint that the tool does not declare has the default value of the MCP specification.

- **Writes.** The tool can change data.
- **Destructive.** The tool can make a change that you cannot undo. A client can ask you to confirm before it calls the tool.
- **Not idempotent.** A second call with the same arguments can change more.
- **Closed world.** The tool reads and writes the data of AdCrunch only.