meta_search_ad_library

ServerMeta MCP Server
CategoryRead

WHAT IT DOES

What meta_search_ad_library does on Meta MCP Server

AI agents call meta_search_ad_library to retrieve information from Meta MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why meta_search_ad_library needs a policy

This tool queries a public transparency library and retrieves ad information without modifying, executing operations, or affecting any accounts or financial obligations. The inability to access actual ad accounts and the explicit transparency purpose confirm it is a harmless data retrieval operation with minimal risk.

From the tool's definition Tool name contains 'search' and description states it 'Searches the Meta Ad Library for ads from any advertiser.' The emphasis on transparency and 'no ad account access needed' confirms read-only access to public library data.

Documented attack patterns abuse exactly the kind of access meta_search_ad_library gives an agent:

POLICY

How to control meta_search_ad_library

PolicyLayer is an MCP gateway — it sits between your AI agents and Meta MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for meta_search_ad_library:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "meta_search_ad_library": {}
  }
}

meta_search_ad_library is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Meta MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Meta MCP Server tools

Financial meta_create_adset Creates a new ad set within a campaign. Args: - ad_account_id (string): Ad account ID ( Financial meta_create_campaign Creates a new campaign in a Meta ad account. Args: - ad_account_id (string): Ad account Destructive meta_delete_ad Deletes an ad permanently. Args: - ad_id (string): Ad ID to delete Destructive meta_delete_ad_rule Deletes an automated ad rule. Args: - rule_id (string): Ad rule ID Destructive meta_delete_adset Deletes an ad set permanently. Args: - adset_id (string): Ad set ID to delete Destructive meta_delete_campaign Deletes (archives) a campaign. This cannot be undone. Args: - campaign_id (string): Cam Destructive meta_delete_comment Deletes a comment on a Facebook Page post. Permanent action. Args: - comment_id (string Destructive meta_delete_custom_audience Deletes a custom audience permanently. This cannot be undone. Args: - audience_id (stri

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Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about meta_search_ad_library

What does the meta_search_ad_library tool do? +

Searches the Meta Ad Library for ads from any advertiser. This is a transparency tool — no ad account access needed. Args: - ad_reached_countries (string[]): Required. ISO country codes where ads were shown (e.g., [. It is categorised as a Read tool in the Meta MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on meta_search_ad_library? +

Register the Meta MCP Server MCP server in PolicyLayer and add a rule for meta_search_ad_library: 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 Meta MCP Server. Nothing to install.

What risk level is meta_search_ad_library? +

meta_search_ad_library is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit meta_search_ad_library? +

Yes. Add a rate_limit block to the meta_search_ad_library 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.

How do I block meta_search_ad_library completely? +

Set action: deny in the PolicyLayer policy for meta_search_ad_library. 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.

What MCP server provides meta_search_ad_library? +

meta_search_ad_library is provided by the Meta MCP Server MCP server (oliverames/meta-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Meta MCP Server tool call.

Start from Meta 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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