AI agents use mutate_campaign_asset_sets to create or update resources in Google Ads — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Google Ads environment.
This tool creates or modifies campaign asset sets in Google Ads, which are reversible changes to advertising configurations. It does not delete data (would be Destructive), execute arbitrary code (would be Execute), or move money directly (would be Financial). The high severity reflects the potential blast radius: misconfigured asset sets could affect ad delivery and spend across campaigns.
From the tool's definition Tool name 'mutate_campaign_asset_sets' indicates modification of campaign asset sets via the Google Ads API v20. The verb 'mutate' is standard terminology in Google Ads API for create/update/remove operations.
Documented attack patterns abuse exactly the kind of access mutate_campaign_asset_sets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google Ads, and nothing reaches the server without passing your rules. This is the rule we recommend for mutate_campaign_asset_sets:
{
"version": "1",
"default": "deny",
"tools": {
"mutate_campaign_asset_sets": {
"limits": [
{
"counter": "mutate_campaign_asset_sets_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}mutate_campaign_asset_sets 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.
Free to start. No card required.
mutate_campaign_asset_sets. It is categorised as a Write tool in the Google Ads MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Google Ads MCP server in PolicyLayer and add a rule for mutate_campaign_asset_sets: 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 Ads. Nothing to install.
mutate_campaign_asset_sets 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 mutate_campaign_asset_sets 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 mutate_campaign_asset_sets. 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.
mutate_campaign_asset_sets is provided by the Google Ads MCP server (promobase/google-ads-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Google Ads, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
59 Google Ads tools catalogued and risk-classified — across an index of 43,000+ MCP servers.