fm_logout · FileMaker MCP Server MCP: Risk & Policy

WHAT IT DOES

What fm_logout does on FileMaker MCP Server

AI agents invoke fm_logout to trigger actions in FileMaker MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why fm_logout needs a policy

Logging out terminates an active session, which is an external operation with a side effect (invalidating the session token). It doesn't read, write, or destroy data, but it triggers an action on the FileMaker Data API. Misuse could disrupt ongoing operations by prematurely ending sessions.

From the tool's definition 「セッションを終了します」— terminates a session for the specified database

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fm_logout Rate-limited

fm_logout stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "fm_logout": {
      "limits": [
        {
          "counter": "fm_logout_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches FileMaker MCP Server, so you can run agents against it safely.

FAQ

Questions about fm_logout

What does the fm_logout tool do? +

指定されたデータベースのセッションを終了します。. It is categorised as a Execute tool in the FileMaker MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on fm_logout? +

Register the FileMaker MCP Server MCP server in PolicyLayer and add a rule for fm_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 FileMaker MCP Server. Nothing to install.

What risk level is fm_logout? +

fm_logout is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit fm_logout? +

Yes. Add a rate_limit block to the fm_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 fm_logout completely? +

Set action: deny in the PolicyLayer policy for fm_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 fm_logout? +

fm_logout is provided by the FileMaker MCP Server MCP server (ta-toshio/filemaker-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.