finish_exam_day_mode

THE RISK

High Risk

Why finish_exam_day_mode needs a policy

This tool triggers an external operational state change (finishing exam day mode) in the school portal system. While the description is minimal, 'finishing' an exam day mode likely involves terminating a time-sensitive, high-stakes session or mode that cannot easily be reversed - potentially affecting students' ability to access exam resources.

From the tool's definition 'Finish exam day mode' - triggers an external operation that ends a special exam day state in the school portal

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

POLICY

How to control finish_exam_day_mode

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

policy.json

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

finish_exam_day_mode 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.

Create a free account and register N Lobby 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.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

High-risk tools in N Lobby MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about finish_exam_day_mode

What does the finish_exam_day_mode tool do? +

Finish exam day mode. It is categorised as a Execute tool in the N Lobby 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 finish_exam_day_mode? +

Register the N Lobby MCP Server MCP server in PolicyLayer and add a rule for finish_exam_day_mode: 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 N Lobby MCP Server. Nothing to install.

What risk level is finish_exam_day_mode? +

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

Can I rate-limit finish_exam_day_mode? +

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

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

finish_exam_day_mode is provided by the N Lobby MCP Server MCP server (minagishl/nlobby-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every N Lobby MCP Server tool call.

Start from N Lobby 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 →