AI agents call get_creative to retrieve information from Google Ad Manager MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about a creative asset by its identifier. It performs a query operation that returns data without side effects, modification, or resource consumption. The verb 'Get' and the lack of any mention of updates, deletion, or state changes confirm this is a read-only operation.
From the tool's definition Tool name 'get_creative' and description 'Get creative details by ID' indicate a retrieval operation with no modification of data.
Documented attack patterns abuse exactly the kind of access get_creative gives an agent:
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 get_creative:
{
"version": "1",
"default": "deny",
"tools": {
"get_creative": {}
}
}get_creative is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get creative details by ID. It is categorised as a Read tool in the Google Ad Manager MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Google Ad Manager MCP Server MCP server in PolicyLayer and add a rule for get_creative: 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.
get_creative is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_creative 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.
Set action: deny in the PolicyLayer policy for get_creative. 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.
get_creative 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.
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.
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35 Google Ad Manager MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.