Fetch one ad by id.
AI agents call get_ad to retrieve information from OpenAI Ads 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 a single ad object using an identifier. It performs a read-only query against the ads API, returning data without creating, modifying, deleting, or executing any actions. The low severity reflects minimal blast radius if an AI agent calls it — at worst, it exposes advertising account data already accessible to authenticated users of this API.
From the tool's definition Tool name is 'get_ad' and description states 'Fetch one ad by id' — this is a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Fetch one ad by id. It is categorised as a Read tool in the OpenAI Ads MCP Server MCP Server, which means it retrieves data without modifying state.
Register the OpenAI Ads MCP Server MCP server in PolicyLayer and add a rule for get_ad: 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 OpenAI Ads MCP Server. Nothing to install.
get_ad 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_ad 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_ad. 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_ad is provided by the OpenAI Ads MCP Server MCP server (roast-labs/openai-ads-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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