crunch_generate · Kali MCP: Risk & Policy

WHAT IT DOES

What crunch_generate does on Kali

AI agents invoke crunch_generate 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 crunch_generate needs a policy

Crunch is a wordlist/password generator tool commonly used in Kali Linux for password attack preparation. The tool likely generates wordlists used in brute-force or dictionary attacks. The description is empty, lowering confidence, but the server context (penetration testing, password attacks) and the tool name strongly suggest it generates password lists.

From the tool's definition Tool name: crunch_generate; server description mentions 'password attacks' among 90+ tools on a Kali Linux penetration testing server.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

crunch_generate Rate-limited

crunch_generate 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": {
    "crunch_generate": {
      "limits": [
        {
          "counter": "crunch_generate_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 crunch_generate

What does the crunch_generate tool do? +

crunch_generate. 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 crunch_generate? +

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

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

Can I rate-limit crunch_generate? +

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

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

crunch_generate 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.