AI agents use update_creative to create or update resources in Google Ad Manager MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Google Ad Manager MCP Server environment.
The tool updates (modifies) creative assets within ad campaigns, which is a reversible Write operation. Severity is high because misconfigured ad creatives could lead to compliance violations, brand damage, or unintended ad spend. Not Destructive because updates are typically reversible; not Financial because it doesn't directly move money (though ad operations have financial consequences).
From the tool's definition Tool name 'update_creative' indicates modification of creative assets. Server context shows this is a Google Ad Manager tool for managing ad campaigns and creatives.
Documented attack patterns abuse exactly the kind of access update_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 update_creative:
{
"version": "1",
"default": "deny",
"tools": {
"update_creative": {
"limits": [
{
"counter": "update_creative_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_creative 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.
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update_creative. 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.
Register the Google Ad Manager MCP Server MCP server in PolicyLayer and add a rule for update_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.
update_creative is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_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 update_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.
update_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.