meg_scan · Kali MCP: Risk & Policy

WHAT IT DOES

What meg_scan does on Kali

AI agents invoke meg_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 meg_scan needs a policy

meg is a web path/URL fetching tool used in penetration testing to probe multiple paths across multiple hosts. The tool executes an active reconnaissance operation against external targets. Given the Kali Linux context and the broader server description emphasizing offensive security tooling, this constitutes execution of an external operation whose effects depend on arguments.

From the tool's definition 'Execute meg with the provided parameters' on a Kali Linux penetration testing server that 'supports network scanning, web scanning, password attacks and 90+ tools'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

meg_scan Rate-limited

meg_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": {
    "meg_scan": {
      "limits": [
        {
          "counter": "meg_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 meg_scan

What does the meg_scan tool do? +

Execute meg 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 meg_scan? +

Register the Kali MCP server in PolicyLayer and add a rule for meg_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 meg_scan? +

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

Can I rate-limit meg_scan? +

Yes. Add a rate_limit block to the meg_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 meg_scan completely? +

Set action: deny in the PolicyLayer policy for meg_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 meg_scan? +

meg_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.