post-tweet · X MCP: Risk & Policy

WHAT IT DOES

What post-tweet does on X

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

WHY IT NEEDS A POLICY

Why post-tweet needs a policy

This tool creates new data (a tweet) on a social media platform, which is reversible (tweets can be deleted). It does not execute arbitrary code, delete data irreversibly, or move money. The severity is medium because misuse could result in unwanted public posts, reputational harm, or spam, but the effects are limited to content creation and can be undone.

From the tool's definition Tool description explicitly states 'Post a tweet with the specified content', indicating creation of new content on the platform.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

post-tweet Rate-limited

post-tweet 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-tweet": {
      "limits": [
        {
          "counter": "post-tweet_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches X, so you can run agents against it safely.

FAQ

Questions about post-tweet

What does the post-tweet tool do? +

Post a tweet with the specified content. It is categorised as a Write tool in the X 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-tweet? +

Register the X MCP server in PolicyLayer and add a rule for post-tweet: 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 X. Nothing to install.

What risk level is post-tweet? +

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

Can I rate-limit post-tweet? +

Yes. Add a rate_limit block to the post-tweet 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-tweet completely? +

Set action: deny in the PolicyLayer policy for post-tweet. 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-tweet? +

post-tweet is provided by the X MCP server (siddheshutd/x-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

post-tweet is one line of X's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →