meta_delete_custom_audience

THE RISK

Critical Risk

Why meta_delete_custom_audience needs a policy

This tool irreversibly removes data (a custom audience) that likely represents accumulated customer targeting data, engagement history, or business assets. While not a financial transaction, the permanent loss of a custom audience—potentially built over time and used for marketing campaigns—represents significant business impact.

From the tool's definition Tool description explicitly states: 'Deletes a custom audience permanently. This cannot be undone.' The verb 'Deletes' combined with 'permanently' and 'cannot be undone' is unambiguous destructive action.

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

POLICY

How to control meta_delete_custom_audience

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_delete_custom_audience:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "meta_delete_custom_audience"
  ]
}

meta_delete_custom_audience disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

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.

RESTRICT THIS TOOL →

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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_instagram_comment Deletes a comment on an Instagram media object. This is permanent. Args: - comment_id (

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Go deeper

Critical-risk tools in Meta MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about meta_delete_custom_audience

What does the meta_delete_custom_audience tool do? +

Deletes a custom audience permanently. This cannot be undone. Args: - audience_id (string): Custom audience ID to delete. It is categorised as a Destructive tool in the Meta MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on meta_delete_custom_audience? +

Register the Meta MCP Server MCP server in PolicyLayer and add a rule for meta_delete_custom_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.

What risk level is meta_delete_custom_audience? +

meta_delete_custom_audience is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit meta_delete_custom_audience? +

Yes. Add a rate_limit block to the meta_delete_custom_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.

How do I block meta_delete_custom_audience completely? +

Set action: deny in the PolicyLayer policy for meta_delete_custom_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.

What MCP server provides meta_delete_custom_audience? +

meta_delete_custom_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.

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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