find_or_create_advertiser

THE RISK

Medium Risk

Why find_or_create_advertiser needs a policy

The name suggests a find-or-create pattern: if the advertiser exists, it reads/returns it; if not, it creates a new advertiser entity. Creation of advertiser records is a Write operation. The sibling tool 'create_advertiser' confirms that advertiser creation is a distinct Write-category action on this server. Severity is medium as creating advertiser records modifies campaign data but is reversible.

From the tool's definition Tool name 'find_or_create_advertiser' implies either reading existing data or creating a new advertiser record. No description provided.

Documented attack patterns abuse exactly the kind of access find_or_create_advertiser gives an agent:

POLICY

How to control find_or_create_advertiser

PolicyLayer is an MCP gateway — it sits between your AI agents and Google Ad Manager MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for find_or_create_advertiser:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "find_or_create_advertiser": {
      "limits": [
        {
          "counter": "find_or_create_advertiser_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

find_or_create_advertiser stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Google Ad Manager MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Google Ad Manager MCP Server tools

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All 35 Google Ad Manager MCP Server tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about find_or_create_advertiser

What does the find_or_create_advertiser tool do? +

find_or_create_advertiser. It is categorised as a Write tool in the Google Ad Manager MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on find_or_create_advertiser? +

Register the Google Ad Manager MCP Server MCP server in PolicyLayer and add a rule for find_or_create_advertiser: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Google Ad Manager MCP Server. Nothing to install.

What risk level is find_or_create_advertiser? +

find_or_create_advertiser is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit find_or_create_advertiser? +

Yes. Add a rate_limit block to the find_or_create_advertiser rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block find_or_create_advertiser completely? +

Set action: deny in the PolicyLayer policy for find_or_create_advertiser. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides find_or_create_advertiser? +

find_or_create_advertiser is provided by the Google Ad Manager MCP Server MCP server (matiouscorp/google-ad-manager-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Google Ad Manager MCP Server tool call.

Start from Google Ad Manager MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →