disable_dead_host · Nginx Proxy Manager MCP: Risk & Policy

WHAT IT DOES

What disable_dead_host does on Nginx Proxy Manager MCP

AI agents use disable_dead_host to create or update resources in Nginx Proxy Manager MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Nginx Proxy Manager MCP environment.

WHY IT NEEDS A POLICY

Why disable_dead_host needs a policy

This tool modifies the enabled/disabled state of a dead host configuration, which is a reversible change. It does not permanently delete data (would be Destructive) nor execute arbitrary commands (would be Execute). The impact is medium severity because disabling a host could affect traffic routing and service availability, but the change is reversible by re-enabling the host.

From the tool's definition Tool name 'disable_dead_host' and description 'Disable a dead host' indicate a state modification operation on an existing infrastructure resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

disable_dead_host Rate-limited

disable_dead_host stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "disable_dead_host": {
      "limits": [
        {
          "counter": "disable_dead_host_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about disable_dead_host

What does the disable_dead_host tool do? +

Disable a dead host. It is categorised as a Write tool in the Nginx Proxy Manager MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on disable_dead_host? +

Register the Nginx Proxy Manager MCP server in PolicyLayer and add a rule for disable_dead_host: 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 Nginx Proxy Manager MCP. Nothing to install.

What risk level is disable_dead_host? +

disable_dead_host is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit disable_dead_host? +

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

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

disable_dead_host is provided by the Nginx Proxy Manager MCP server (verybigsad/nginx-proxy-manager-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.