mcpretentious-close

THE RISK

Critical Risk

Why mcpretentious-close needs a policy

Closing a terminal window is an irreversible action that terminates running processes, destroys session state, and loses any unsaved work in that terminal. This cannot be undone — any running processes are killed and the session is gone. This qualifies as Destructive with high severity since an AI agent misusing this could terminate critical sessions or running jobs.

From the tool's definition Closes the terminal window associated with the specified terminal ID

Documented attack patterns abuse exactly the kind of access mcpretentious-close gives an agent:

POLICY

How to control mcpretentious-close

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

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "mcpretentious-close"
  ]
}

mcpretentious-close disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

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

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCPretentious tools

Execute mcpretentious-mouse Send mouse events to a terminal using SGR mouse protocol. This tool provides dire Execute mcpretentious-open Opens a new terminal window and creates a tracked terminal session. Returns a terminal ID Execute mcpretentious-type Send text and keystrokes to a terminal. Always pass as array. Examples: [ Write mcpretentious-resize Resizes a terminal to the specified dimensions in columns × rows. Read mcpretentious-info Gets terminal metadata including dimensions (columns × rows) and session information. Read mcpretentious-list Lists all currently open terminal sessions with their IDs. Read mcpretentious-read Reads text output from a terminal session. Returns the current screen contents. Use mcpret Read mcpretentious-screenshot Takes a token-optimized screenshot of the terminal screen using a layered format that redu

All 9 MCPretentious tools →

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Go deeper

Critical-risk tools in MCPretentious → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-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.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about mcpretentious-close

What does the mcpretentious-close tool do? +

Closes the terminal window associated with the specified terminal ID. It is categorised as a Destructive tool in the MCPretentious MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on mcpretentious-close? +

Register the MCPretentious MCP server in PolicyLayer and add a rule for mcpretentious-close: 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 MCPretentious. Nothing to install.

What risk level is mcpretentious-close? +

mcpretentious-close is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit mcpretentious-close? +

Yes. Add a rate_limit block to the mcpretentious-close 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 mcpretentious-close completely? +

Set action: deny in the PolicyLayer policy for mcpretentious-close. 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 mcpretentious-close? +

mcpretentious-close is provided by the MCPretentious MCP server (oetiker/mcpretentious). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCPretentious tool call.

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

CHECK YOUR STACK →