rustscan_scan · Kali MCP: Risk & Policy

WHAT IT DOES

What rustscan_scan does on Kali

AI agents invoke rustscan_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 rustscan_scan needs a policy

RustScan is a fast network port scanner. Running it executes an active network reconnaissance operation against target hosts. It has significant blast radius if misused — an AI agent could scan unauthorized networks, triggering legal/security issues. It falls under Execute (runs external tool with effects determined by arguments) rather than Read since it actively probes external systems.

From the tool's definition 'Execute rustscan with the provided parameters' on a Kali Linux MCP server described as supporting 'network scanning, web scanning, password attacks and 90+ tools'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rustscan_scan Rate-limited

rustscan_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": {
    "rustscan_scan": {
      "limits": [
        {
          "counter": "rustscan_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 rustscan_scan

What does the rustscan_scan tool do? +

Execute rustscan 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 rustscan_scan? +

Register the Kali MCP server in PolicyLayer and add a rule for rustscan_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 rustscan_scan? +

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

Can I rate-limit rustscan_scan? +

Yes. Add a rate_limit block to the rustscan_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 rustscan_scan completely? +

Set action: deny in the PolicyLayer policy for rustscan_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 rustscan_scan? +

rustscan_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.