x_follow_user · X MCP: Risk & Policy

WHAT IT DOES

What x_follow_user does on X

AI agents use x_follow_user 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 x_follow_user needs a policy

Following a user creates a social relationship on the platform. This is a reversible write action (the user can be unfollowed), but misuse could result in unwanted follows at scale, making it medium severity.

From the tool's definition Follow a user by their username

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

x_follow_user Rate-limited

x_follow_user 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": {
    "x_follow_user": {
      "limits": [
        {
          "counter": "x_follow_user_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 x_follow_user

What does the x_follow_user tool do? +

Follow a user by their username. 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 x_follow_user? +

Register the X MCP server in PolicyLayer and add a rule for x_follow_user: 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 x_follow_user? +

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

Can I rate-limit x_follow_user? +

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

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

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