logout · FakeStore MCP: Risk & Policy

WHAT IT DOES

What logout does on FakeStore MCP

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

WHY IT NEEDS A POLICY

Why logout needs a policy

Logging out invalidates the current session/token, which is a reversible state change (the user can log back in). It modifies authentication state but does not delete data, execute code, or involve financial transactions. Severity is low as the blast radius of misuse is minimal — it would simply terminate the current session.

From the tool's definition Log out the current user

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

logout Rate-limited

logout 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": {
    "logout": {
      "limits": [
        {
          "counter": "logout_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 FakeStore MCP, so you can run agents against it safely.

FAQ

Questions about logout

What does the logout tool do? +

Log out the current user. It is categorised as a Write tool in the FakeStore MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on logout? +

Register the FakeStore MCP server in PolicyLayer and add a rule for logout: 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 FakeStore MCP. Nothing to install.

What risk level is logout? +

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

Can I rate-limit logout? +

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

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

logout is provided by the FakeStore MCP server (mithgroth/fakestore-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.