hydra_attack · K-MCP: Kali Model Context Protocol Server MCP

WHAT IT DOES

What hydra_attack does on K-MCP: Kali Model Context Protocol Server

AI agents invoke hydra_attack to trigger actions in K-MCP: Kali Model Context Protocol Server. 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 hydra_attack needs a policy

Hydra is a parallelized login cracker that performs brute-force or dictionary attacks against remote authentication services (SSH, FTP, HTTP, etc.). Even with an empty description, the tool name unambiguously identifies it as running Hydra on a Kali Linux terminal. This constitutes executing an offensive security tool against external systems, which can compromise accounts and services.

From the tool's definition Tool name 'hydra_attack' on a Kali Linux MCP server designed for penetration testing. Hydra is a well-known brute-force/credential-stuffing attack tool used to attack authentication services.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

hydra_attack Rate-limited

hydra_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": {
    "hydra_attack": {
      "limits": [
        {
          "counter": "hydra_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 K-MCP: Kali Model Context Protocol Server, so you can run agents against it safely.

FAQ

Questions about hydra_attack

What does the hydra_attack tool do? +

hydra_attack. It is categorised as a Execute tool in the K-MCP: Kali Model Context Protocol Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on hydra_attack? +

Register the K-MCP: Kali Model Context Protocol Server MCP server in PolicyLayer and add a rule for hydra_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 K-MCP: Kali Model Context Protocol Server. Nothing to install.

What risk level is hydra_attack? +

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

Can I rate-limit hydra_attack? +

Yes. Add a rate_limit block to the hydra_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 hydra_attack completely? +

Set action: deny in the PolicyLayer policy for hydra_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 hydra_attack? +

hydra_attack is provided by the K-MCP: Kali Model Context Protocol Server MCP server (stoicmehedi/k-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.