List user lists (remarketing audiences, customer match lists) in the account with size, eligibility, and match rate.
AI agents call gads_list_audiences to retrieve information from Google Ads without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves metadata about existing remarketing and customer match audiences. It performs no data creation, modification, deletion, or execution of external operations. The returned information (audience size, eligibility status, match rate) is informational only. The blast radius of misuse is limited to potential unauthorized viewing of audience configuration data, classified as low severity.
From the tool's definition The tool name contains 'list' and the description explicitly states it 'List[s] user lists...with size, eligibility, and match rate' — these are retrieval/query operations with no modification or side effects.
Attacks that exploit this kind of access
List user lists (remarketing audiences, customer match lists) in the account with size, eligibility, and match rate. It is categorised as a Read tool in the Google Ads MCP Server, which means it retrieves data without modifying state.
Register the Google Ads MCP server in PolicyLayer and add a rule for gads_list_audiences: 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.
gads_list_audiences 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 gads_list_audiences 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 gads_list_audiences. 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.
gads_list_audiences is provided by the Google Ads MCP server (zleventer/google-ads-mcp-npm). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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