post_to_meta

SERVERHermoso SOURCEhttps://app.hermoso.ai/mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/hermoso/post-to-meta.md

WHAT IT DOES

What post_to_meta does on Hermoso

AI agents use post_to_meta to create or update resources in Hermoso, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Hermoso environment.

RISK

Why post_to_meta is rated Medium

An AI agent can call post_to_meta faster than any human can review: one bad instruction and it creates or modifies resources in Hermoso by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs post_to_meta safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Hermoso, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For post_to_meta, this is the rule to start with:

post_to_meta Rate-limited

post_to_meta 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "post_to_meta": {
      "limits": [
        {
          "counter": "post_to_meta_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Hermoso, apply this rule, and every post_to_meta call is checked against it from then on.

FAQ

Questions about post_to_meta

What does the post_to_meta tool do? +

Publish to a connected Facebook Page, its linked Instagram, OR the brand’s Threads account — text/link/image/VIDEO/CAROUSEL. A MULTI-SLIDE creative is a CAROUSEL, not several posts: pass the slides in order as imageUrls[] and they publish as ONE swipeable post (Instagram album, Threads carousel, Facebook multi-photo post). Never publish slide 1 of a deck on its own — the creative tells the viewer to swipe. target:. It is categorised as a Write tool in the Hermoso MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on post_to_meta? +

Register the Hermoso MCP server in PolicyLayer and add a rule for post_to_meta: 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 Hermoso. Nothing to install.

What risk level is post_to_meta? +

post_to_meta is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit post_to_meta? +

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

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

post_to_meta is provided by the Hermoso MCP server (https://app.hermoso.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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