> ## Documentation Index
> Fetch the complete documentation index at: https://docs.markifact.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List Built In Variables

> Lists the built-in variables currently enabled in a Google Tag Manager workspace

Lists the built-in variables currently enabled in a Google Tag Manager workspace. Built-in variables (e.g. Page URL, Click Classes) must be enabled before tags or triggers can reference them.

|                      |                               |
| -------------------- | ----------------------------- |
| **App**              | Google Tag Manager            |
| **Operation ID**     | `gtm_list_built_in_variables` |
| **Type**             | Action                        |
| **Connection**       | `gtm` (required)              |
| **Credits per run**  | 1                             |
| **Agent / MCP tool** | Yes                           |

## Inputs

| Field       | Type           | Required | Default | Description                                                           |
| ----------- | -------------- | -------- | ------- | --------------------------------------------------------------------- |
| `account`   | DynamicAccount | Yes      | -       | Select the Google Tag Manager account.                                |
| `container` | DynamicAccount | Yes      | -       | Select the container.                                                 |
| `workspace` | DynamicAccount | Yes      | -       | Select the workspace.                                                 |
| `limit`     | integer        | No       | `200`   | Maximum number of enabled built-in variables to return. Default: 200. |

## Output

**Type**: `List[Dict]`

Returns the raw list of enabled built-in variables as provided by the Tag Manager API.