close_session

THE RISK

Low Risk

Why close_session needs a policy

The description is empty, so the classification relies solely on the tool name. 'close_session' typically terminates a session or connection, which is a benign cleanup operation. Without further context, it does not clearly fit Read, Write, Execute, Destructive, or Financial categories. Confidence is low due to the lack of description.

From the tool's definition Tool name is 'close_session' and description is empty or uninformative.

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

POLICY

How to control close_session

PolicyLayer is an MCP gateway — it sits between your AI agents and Live2D Automation MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for close_session:

policy.json

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

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

Create a free account and register Live2D Automation MCP Server — 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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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 close_session

What does the close_session tool do? +

close_session. It is categorised as a Other tool in the Live2D Automation MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on close_session? +

Register the Live2D Automation MCP Server MCP server in PolicyLayer and add a rule for close_session: 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 Live2D Automation MCP Server. Nothing to install.

What risk level is close_session? +

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

Can I rate-limit close_session? +

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

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

close_session is provided by the Live2D Automation MCP Server MCP server (j621111/live2d-automation). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Live2D Automation MCP Server tool call.

Start from Live2D Automation MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →