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

# add_call_asset

> Attach a phone number call asset to a campaign: creates the call asset (create_google_call_asset) and links it to the campaign (link_google_asset_to_campaign).

> [!WARNING]
>
> **Change — approval required.** Calling this tool does not change your ad account. ADSMCP checks the arguments and stages the change as a pending action. It runs only after a person approves it on the dashboard [Approvals](https://adsmcp.si/dashboard/approvals) page. Over MCP or REST you can view (`list_pending_actions`) or reject (`manage_action`) it, never approve it. `execution_mode` and similar arguments do not skip the queue.
>
> A change that fails when it runs is not retried automatically. It shows on the dashboard Execution Queue.

Attach a phone number call asset to a campaign: creates the call asset (create\_google\_call\_asset) and links it to the campaign (link\_google\_asset\_to\_campaign). Call conversion tracking options are not supported. If the create step is queued for approval the tool stops there and returns the link step still to run.

**Platform:** Google Ads · **Type:** Change

## How to call it

* **MCP:** on `https://mcp.adsmcp.si/mcp`, run it through the `google_ads_write` tool with `{"action": "execute", "tool_name": "add_call_asset", "arguments": { ... }}`, or call `add_call_asset` by name. `search_tools` finds it and `get_tool_schema` returns its arguments; `https://mcp.adsmcp.si/mcp/flat` lists every tool by name.
* **REST:** `POST https://mcp.adsmcp.si/api/v1/tools/add_call_asset/execute` with `Authorization: Bearer sk_live_...` and a JSON body `{"platform": "google", "arguments": { ... }}`. The arguments are listed below; they are exactly the tool's input schema.


## OpenAPI

````yaml api-reference/openapi.json POST /api/v1/tools/add_call_asset/execute
openapi: 3.1.0
info:
  title: ADSMCP REST API
  version: 0.1.0
  description: >-
    ADSMCP REST API: every public ADSMCP tool as POST
    /api/v1/tools/{name}/execute. Generated from the ADSMCP code (the service
    serves the same document at GET /api/v1/openapi.json). Changes to ad
    accounts are staged for approval by a person on the ADSMCP dashboard;
    nothing in this API can approve them.
servers:
  - url: https://mcp.adsmcp.si
    description: ADSMCP MCP and REST service
security: []
paths:
  /api/v1/tools/add_call_asset/execute:
    post:
      tags:
        - google
      summary: >-
        Attach a phone number call asset to a campaign: creates the call asset
        (create_google_call_asset) and links it to the campaign
        (link_google_asset_to_campaign). Call conversion tracking options are
        not supported. If the create step is queued for approval the tool stops
        there and returns the link step still to run.
      description: >-
        Attach a phone number call asset to a campaign: creates the call asset
        (create_google_call_asset) and links it to the campaign
        (link_google_asset_to_campaign). Call conversion tracking options are
        not supported. If the create step is queued for approval the tool stops
        there and returns the link step still to run. Use this when you intend
        that change. Write tools create paused objects or wait for approval, and
        a failed spend-affecting call is not retried automatically.
      operationId: execute_add_call_asset
      parameters:
        - name: Authorization
          in: header
          required: true
          schema:
            type: string
          description: Bearer token
        - name: Idempotency-Key
          in: header
          required: false
          schema:
            type: string
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties:
                platform:
                  type: string
                  default: google
                arguments:
                  type: object
                  properties:
                    account_id:
                      type: string
                      description: Google Ads customer id.
                    login_customer_id:
                      type: string
                      description: >-
                        Manager (MCC) customer id, when the account is accessed
                        through one.
                    campaign_id:
                      type: string
                      description: Campaign to attach the phone number to.
                    phone_number:
                      type: string
                      description: Phone number, e.g. +15551234567.
                    country_code:
                      type: string
                      description: Two-letter country code of the number, e.g. US.
                    execution_mode:
                      type: string
                      enum:
                        - paused
                        - approval_required
                      description: Passed unchanged to every write call this tool makes.
                  required:
                    - account_id
                    - campaign_id
                    - phone_number
                    - country_code
                  additionalProperties: false
              additionalProperties: false
      responses:
        '200':
          description: Tool execution result.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExecuteToolResponse'
        '400':
          description: Invalid JSON input.
        '401':
          description: Authentication error.
      security:
        - bearerAuth: []
components:
  schemas:
    ExecuteToolResponse:
      type: object
      properties:
        ok:
          type: boolean
        platform:
          type: string
        tool:
          type: string
        data: {}
        error:
          anyOf:
            - type: 'null'
            - $ref: '#/components/schemas/ErrorResponse'
        mcp_response: {}
      required:
        - ok
        - platform
        - tool
        - error
        - mcp_response
      additionalProperties: false
    ErrorResponse:
      type: object
      properties:
        code: {}
        message:
          type: string
        details: {}
      required:
        - message
      additionalProperties: false
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API token

````

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