meta_get_promotable_posts

THE RISK

Low Risk

Why meta_get_promotable_posts needs a policy

This tool queries and retrieves existing data about which posts on a Facebook Page are eligible for promotion. It performs no side effects, does not modify or delete data, does not execute operations, and does not involve financial transactions. It is a straightforward read operation to fetch metadata about post eligibility.

From the tool's definition Tool name contains 'get' and description states 'Gets posts that are eligible for boosting/promotion' — a retrieval operation with no modification or execution of external effects. Returns data (promotable posts) based on page_id and limit parameters.

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

POLICY

How to control meta_get_promotable_posts

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_get_promotable_posts:

policy.json

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

meta_get_promotable_posts 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.

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EXPLORE

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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_get_promotable_posts

What does the meta_get_promotable_posts tool do? +

Gets posts that are eligible for boosting/promotion on a Facebook Page. Args: - page_id (string): Facebook Page ID - limit (number): Max results (default 20). 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_get_promotable_posts? +

Register the Meta MCP Server MCP server in PolicyLayer and add a rule for meta_get_promotable_posts: 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_get_promotable_posts? +

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

Can I rate-limit meta_get_promotable_posts? +

Yes. Add a rate_limit block to the meta_get_promotable_posts 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_get_promotable_posts completely? +

Set action: deny in the PolicyLayer policy for meta_get_promotable_posts. 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_get_promotable_posts? +

meta_get_promotable_posts 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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