nmap_nse_scan · Kali MCP: Risk & Policy

WHAT IT DOES

What nmap_nse_scan does on Kali

AI agents invoke nmap_nse_scan to trigger actions in Kali. 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 nmap_nse_scan needs a policy

NSE scripts extend Nmap beyond passive scanning into active interaction with remote services, including brute-forcing, exploit checks, and data extraction. This is an execution of external tooling against potentially arbitrary network targets. On a Kali Linux pentesting server, misuse could result in unauthorized network scanning or exploitation of remote hosts, making severity high.

From the tool's definition 'Execute Nmap with NSE scripts' — runs Nmap with NSE (Nmap Scripting Engine) scripts, which can perform active network probing, vulnerability detection, and exploitation-adjacent actions against target systems

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

nmap_nse_scan Rate-limited

nmap_nse_scan 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": {
    "nmap_nse_scan": {
      "limits": [
        {
          "counter": "nmap_nse_scan_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, so you can run agents against it safely.

FAQ

Questions about nmap_nse_scan

What does the nmap_nse_scan tool do? +

Execute Nmap with NSE scripts. It is categorised as a Execute tool in the Kali MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on nmap_nse_scan? +

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

What risk level is nmap_nse_scan? +

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

Can I rate-limit nmap_nse_scan? +

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

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

nmap_nse_scan is provided by the Kali MCP server (pentestt00ls/kali-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.