unregister_passenger_app

THE RISK

Critical Risk

Why unregister_passenger_app needs a policy

Unregistering/removing a Passenger application is a destructive action that cannot be easily undone—it removes the application from the hosting environment, stops its operation, and eliminates its configuration. While not a data deletion in the traditional sense, it permanently removes a critical production resource.

From the tool's definition Tool name explicitly uses 'unregister/remove', and description confirms it removes an application. This is an irreversible operation that deletes application configuration and deployment.

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

POLICY

How to control unregister_passenger_app

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

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "unregister_passenger_app"
  ]
}

unregister_passenger_app 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 cPanel 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.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 164 cPanel MCP Server tools →

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Go deeper

Critical-risk tools in cPanel MCP Server → 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 unregister_passenger_app

What does the unregister_passenger_app tool do? +

Unregister/remove a Node.js, Python, or Ruby application. It is categorised as a Destructive tool in the cPanel MCP Server 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 unregister_passenger_app? +

Register the cPanel MCP Server MCP server in PolicyLayer and add a rule for unregister_passenger_app: 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 cPanel MCP Server. Nothing to install.

What risk level is unregister_passenger_app? +

unregister_passenger_app 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 unregister_passenger_app? +

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

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

unregister_passenger_app is provided by the cPanel MCP Server MCP server (0xhayd3n/cpanel-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every cPanel MCP Server tool call.

Start from cPanel 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 →