netcat_run · Kali Linux MCP Server MCP: Risk & Policy

WHAT IT DOES

What netcat_run does on Kali Linux MCP Server

AI agents invoke netcat_run to trigger actions in Kali Linux MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why netcat_run needs a policy

Netcat (nc) is a powerful networking utility that can create arbitrary network connections, listen on ports, execute shell commands, and establish reverse shells. In the context of a penetration testing framework, 'netcat_run' would execute such operations based on user-supplied arguments.

From the tool's definition Tool named 'netcat_run' on a Kali Linux server that exposes penetration testing and exploitation frameworks. Netcat is a well-known utility that executes arbitrary network operations, reverse shells, and command execution.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

netcat_run Rate-limited

netcat_run 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about netcat_run

What does the netcat_run tool do? +

netcat_run. It is categorised as a Execute tool in the Kali Linux 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 netcat_run? +

Register the Kali Linux MCP Server MCP server in PolicyLayer and add a rule for netcat_run: 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 Kali Linux MCP Server. Nothing to install.

What risk level is netcat_run? +

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

Can I rate-limit netcat_run? +

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

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

netcat_run is provided by the Kali Linux MCP Server MCP server (ofryma/custom-mcp-library). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.