hashcat_crack · Kali Linux MCP Server MCP: Risk & Policy

WHAT IT DOES

What hashcat_crack does on Kali Linux MCP Server

AI agents invoke hashcat_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 hashcat_crack needs a policy

Hashcat executes an active password cracking process against hash inputs. While it doesn't directly delete data, it runs computationally intensive operations to recover credentials, which could enable further unauthorized access. It fits Execute (running external security tools) rather than Read, as it actively processes and transforms data.

From the tool's definition GPU-accelerated password cracking using Hashcat

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

hashcat_crack Rate-limited

hashcat_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": {
    "hashcat_crack": {
      "limits": [
        {
          "counter": "hashcat_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 hashcat_crack

What does the hashcat_crack tool do? +

GPU-accelerated password cracking using Hashcat. 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 hashcat_crack? +

Register the Kali Linux MCP Server MCP server in PolicyLayer and add a rule for hashcat_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 hashcat_crack? +

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

Can I rate-limit hashcat_crack? +

Yes. Add a rate_limit block to the hashcat_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 hashcat_crack completely? +

Set action: deny in the PolicyLayer policy for hashcat_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 hashcat_crack? +

hashcat_crack is provided by the Kali Linux MCP Server MCP server (pellax/kalimcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.