naabu_scan · Kali MCP: Risk & Policy

WHAT IT DOES

What naabu_scan does on Kali

AI agents invoke naabu_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 naabu_scan needs a policy

Naabu is a port scanning tool. The tool executes an external network scanning program with user-provided parameters. This constitutes running an external operation (network scan) whose effects depend on arguments. On a penetration testing server, misuse could involve scanning unauthorized targets, making blast radius high.

From the tool's definition 'Execute naabu with the provided parameters' on a Kali Linux MCP server described as supporting 'network scanning, web scanning, password attacks'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

naabu_scan Rate-limited

naabu_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": {
    "naabu_scan": {
      "limits": [
        {
          "counter": "naabu_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 naabu_scan

What does the naabu_scan tool do? +

Execute naabu with the provided parameters. 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 naabu_scan? +

Register the Kali MCP server in PolicyLayer and add a rule for naabu_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 naabu_scan? +

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

Can I rate-limit naabu_scan? +

Yes. Add a rate_limit block to the naabu_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 naabu_scan completely? +

Set action: deny in the PolicyLayer policy for naabu_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 naabu_scan? +

naabu_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.