mastodon_post

Publish a status (toot). Content is public by default unless visibility is narrowed. Rate-limited: 10/hour per conversation.

SERVERCrow SOURCEkh0pper/crow

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/kh0pper-crow/mastodon-post.md

WHAT IT DOES

What mastodon_post does on Crow

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

RISK

Why mastodon_post is rated Medium

This tool posts content to Mastodon, a public social media platform. It creates new public posts, which is a Write action. Severity is high because an AI agent misusing this tool could publish arbitrary content publicly under the user's identity, causing reputational, social, or legal harm.

From the tool's definition Publish a status (toot). Content is public by default unless visibility is narrowed.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mastodon_post safely

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

mastodon_post Rate-limited

mastodon_post 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": {
    "mastodon_post": {
      "limits": [
        {
          "counter": "mastodon_post_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 Crow, apply this rule, and every mastodon_post call is checked against it from then on.

FAQ

Questions about mastodon_post

What does the mastodon_post tool do? +

Publish a status (toot). Content is public by default unless visibility is narrowed. Rate-limited: 10/hour per conversation. It is categorised as a Write tool in the Crow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mastodon_post? +

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

What risk level is mastodon_post? +

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

Can I rate-limit mastodon_post? +

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

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

mastodon_post is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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