Creates a lookalike audience based on an existing custom audience or page. Args: - ad_account_id (string): Ad account ID - name (string): Audience name - origin_audience_id (string): Source custom audience ID to base the lookalike on - country (string): ISO 3166-1 alpha-2 country code (e.g.,
AI agents use meta_create_lookalike_audience to create or update resources in Meta MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Meta MCP Server environment.
This tool creates new advertising audience segments, which modifies Meta's ad account state by adding a new lookalike audience resource. This is a Write operation (creates data reversibly) rather than Read (no data retrieval) or Destructive (audiences can be deleted/modified later).
From the tool's definition Creates a lookalike audience based on an existing custom audience or page. The verb 'Creates' indicates irreversible data creation in Meta's ad platform.
Documented attack patterns abuse exactly the kind of access meta_create_lookalike_audience gives an agent:
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_create_lookalike_audience:
{
"version": "1",
"default": "deny",
"tools": {
"meta_create_lookalike_audience": {
"limits": [
{
"counter": "meta_create_lookalike_audience_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}meta_create_lookalike_audience 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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Creates a lookalike audience based on an existing custom audience or page. Args: - ad_account_id (string): Ad account ID - name (string): Audience name - origin_audience_id (string): Source custom audience ID to base the lookalike on - country (string): ISO 3166-1 alpha-2 country code (e.g.,. It is categorised as a Write tool in the Meta MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Meta MCP Server MCP server in PolicyLayer and add a rule for meta_create_lookalike_audience: 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.
meta_create_lookalike_audience 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 meta_create_lookalike_audience 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 meta_create_lookalike_audience. 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.
meta_create_lookalike_audience 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.
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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200 Meta MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.