get_post_reactions_like_total

THE RISK

Low Risk

Why get_post_reactions_like_total needs a policy

This tool performs a read-only operation to retrieve analytics metrics (count of Like reactions on a post). It has no side effects, makes no modifications, executes no code, and poses minimal risk. The blast radius of misuse is negligible—an AI agent querying this endpoint cannot harm data, trigger unauthorized actions, or cause financial impact.

From the tool's definition Tool name 'get_post_reactions_like_total' and description 'Fetch number of 'Like' reactions' indicate a query operation that retrieves aggregated reaction data without modifying or executing any actions.

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

POLICY

How to control get_post_reactions_like_total

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

policy.json

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

get_post_reactions_like_total 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 Just Facebook 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 →

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EXPLORE

Related tools and policies

More Just Facebook MCP Server tools

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All 30 Just Facebook MCP Server tools →

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 get_post_reactions_like_total

What does the get_post_reactions_like_total tool do? +

Fetch number of 'Like' reactions. It is categorised as a Read tool in the Just Facebook MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_post_reactions_like_total? +

Register the Just Facebook MCP Server MCP server in PolicyLayer and add a rule for get_post_reactions_like_total: 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 Just Facebook MCP Server. Nothing to install.

What risk level is get_post_reactions_like_total? +

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

Can I rate-limit get_post_reactions_like_total? +

Yes. Add a rate_limit block to the get_post_reactions_like_total 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 get_post_reactions_like_total completely? +

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

get_post_reactions_like_total is provided by the Just Facebook MCP Server MCP server (livia-zaharia/just_facebook_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Just Facebook MCP Server tool call.

Start from Just Facebook MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →