gts_unfollow

THE RISK

Medium Risk

Why gts_unfollow needs a policy

Unfollowing an account modifies a social relationship state (removes a follow relationship). This is a reversible write operation — the user can re-follow the account. It does not delete data irreversibly, execute code, or involve finances. Severity is medium because an AI agent misusing this could silently remove social connections without user awareness.

From the tool's definition Unfollow an account

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

POLICY

How to control gts_unfollow

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

policy.json

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

gts_unfollow 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.

Create a free account and register Crow — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about gts_unfollow

What does the gts_unfollow tool do? +

Unfollow an account. 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 gts_unfollow? +

Register the Crow MCP server in PolicyLayer and add a rule for gts_unfollow: 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 gts_unfollow? +

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

Can I rate-limit gts_unfollow? +

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

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

gts_unfollow 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.

Enforce policy on every Crow tool call.

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

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