medusa_attack · Kali MCP: Risk & Policy

WHAT IT DOES

What medusa_attack does on Kali

AI agents invoke medusa_attack 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 medusa_attack needs a policy

Medusa is a widely-known credential brute-forcing tool used in penetration testing to perform parallel login attacks against remote authentication services (SSH, FTP, HTTP, etc.). Despite the empty description, the tool name strongly implies active credential attack execution against remote systems.

From the tool's definition Tool name 'medusa_attack' on a server described as supporting '密码攻击' (password attacks) among 90+ penetration testing tools. Medusa is a well-known parallel password brute-force tool.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

medusa_attack Rate-limited

medusa_attack 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": {
    "medusa_attack": {
      "limits": [
        {
          "counter": "medusa_attack_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 medusa_attack

What does the medusa_attack tool do? +

medusa_attack. 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 medusa_attack? +

Register the Kali MCP server in PolicyLayer and add a rule for medusa_attack: 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 medusa_attack? +

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

Can I rate-limit medusa_attack? +

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

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

medusa_attack 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.