gts_feed

THE RISK

Low Risk

Why gts_feed needs a policy

This tool retrieves timeline data for display purposes only. 'Fetch' is a classic read operation that queries and returns data without modifying, deleting, or executing any external operations. The capability is limited to data retrieval from what appears to be a GoToSocial (GTS) server integration.

From the tool's definition Tool name 'gts_feed' with description 'Fetch a timeline' indicates retrieval of data. The 'home' option references fetching an authenticated user's home timeline, which is a read-only query operation with no side effects.

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

POLICY

How to control gts_feed

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_feed:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gts_feed": {}
  }
}

gts_feed is read-only, so it stays allowed — but 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about gts_feed

What does the gts_feed tool do? +

Fetch a timeline. Choices: home (authenticated user. It is categorised as a Read tool in the Crow MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on gts_feed? +

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

gts_feed is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit gts_feed? +

Yes. Add a rate_limit block to the gts_feed 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_feed completely? +

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

gts_feed 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.

CHECK YOUR STACK →