fcrackzip_crack · Kali Linux MCP Server MCP: Risk & Policy

WHAT IT DOES

What fcrackzip_crack does on Kali Linux MCP Server

AI agents invoke fcrackzip_crack to trigger actions in Kali Linux MCP 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 fcrackzip_crack needs a policy

fcrackzip is a password cracker for ZIP archives. While the description is empty (lowering confidence slightly), the tool name clearly references a password cracking operation. Password cracking involves executing brute-force or dictionary attacks against encrypted files. This is categorized as Execute due to running a compute-intensive attack process.

From the tool's definition Tool name 'fcrackzip_crack' references fcrackzip, a well-known ZIP password cracking tool available in Kali Linux. The server description mentions 'password cracking' as a core capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fcrackzip_crack Rate-limited

fcrackzip_crack 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": {
    "fcrackzip_crack": {
      "limits": [
        {
          "counter": "fcrackzip_crack_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 Linux MCP Server, so you can run agents against it safely.

FAQ

Questions about fcrackzip_crack

What does the fcrackzip_crack tool do? +

fcrackzip_crack. It is categorised as a Execute tool in the Kali Linux MCP 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 fcrackzip_crack? +

Register the Kali Linux MCP Server MCP server in PolicyLayer and add a rule for fcrackzip_crack: 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 Linux MCP Server. Nothing to install.

What risk level is fcrackzip_crack? +

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

Can I rate-limit fcrackzip_crack? +

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

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

fcrackzip_crack is provided by the Kali Linux MCP Server MCP server (ofryma/custom-mcp-library). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.