logout_broker

THE RISK

Low Risk

Why logout_broker needs a policy

This tool terminates authentication sessions with brokers. It doesn't read data, write/modify trading data, execute trades, destroy data, or move money. It is a session management operation — invalidating credentials/tokens — which fits 'Other' as the most accurate category. Misuse could disrupt trading operations by ending active sessions, but the blast radius is limited and reversible via re-authentication.

From the tool's definition Logout from a specific broker or all brokers in your session

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

POLICY

How to control logout_broker

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "logout_broker": {
      "limits": [
        {
          "counter": "logout_broker_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

logout_broker gets a rate cap, and everything else on the server is denied unless you say otherwise.

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

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

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All 45 Turtlestack Lite tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about logout_broker

What does the logout_broker tool do? +

Logout from a specific broker or all brokers in your session. It is categorised as a Other tool in the Turtlestack Lite MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on logout_broker? +

Register the Turtlestack Lite MCP server in PolicyLayer and add a rule for logout_broker: 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 Turtlestack Lite. Nothing to install.

What risk level is logout_broker? +

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

Can I rate-limit logout_broker? +

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

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

logout_broker is provided by the Turtlestack Lite MCP server (turtlehq-tech/turtlestack-lite). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Turtlestack Lite tool call.

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

CHECK YOUR STACK →