# linkedin_upload_thumbnail

> Upload the custom thumbnail of a video declared with uploadThumbnail, using its signed initialization receipt.

[Documentation](https://www.getmcpads.com/docs) / [Sources](https://www.getmcpads.com/docs/sources) / [LinkedIn Ads](https://www.getmcpads.com/docs/sources/linkedin-ads)

Upload the custom thumbnail of a video declared with uploadThumbnail, using its signed initialization receipt. JPG or PNG, up to 2 MiB decoded. Run it before linkedin_finalize_upload and pass the returned thumbnailReceipt there.

> **Note** Connect LinkedIn and select the advertising accounts your assistant may access. Native account roles and organization permissions apply.

> **Warning** This tool changes the account. It is absent from the tool list on the Free plan, and it previews by default: without `confirm: true` it describes the change and applies nothing.

|  |  |
| --- | --- |
| Source | [LinkedIn Ads](https://www.getmcpads.com/docs/sources/linkedin-ads) |
| Kind | Write |
| Discovery | Reachable through `search_tools` and `run_write_tool` |
| Account parameter | `adAccountId` |
| Endpoint | https://mcp.getmcpads.com/linkedin-ads/mcp |

## Parameters

| Name | Type | Required | Notes |
| --- | --- | --- | --- |
| `adAccountId` | string | Required | Selected LinkedIn advertising account, numeric ID. |
| `receipt` | string | Required | Signed initialization receipt returned by linkedin_initialize_upload; preserve it exactly. |
| `bytesBase64` | string | Required | Base64 encoding of the exact required part bytes, up to 8 MiB decoded. |
| `confirm` | boolean | Optional | Preview unless true. Apply only after explicit approval, in a selected account with native write permission. Default: `false`. |

## Calling it

Through run_write_tool, since it is not announced

```json
{
  "name": "run_write_tool",
  "arguments": {
    "name": "linkedin_upload_thumbnail",
    "args": {
      "adAccountId": "<string>",
      "receipt": "<string>",
      "bytesBase64": "<string>"
    }
  }
}
```

- [LinkedIn Ads metrics](https://www.getmcpads.com/docs/sources/linkedin-ads/metrics): What you can ask for.
- [LinkedIn Ads dimensions](https://www.getmcpads.com/docs/sources/linkedin-ads/dimensions): How you can break it down.

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