create_wordlist_rules

THE RISK

High Risk

Why create_wordlist_rules needs a policy

This tool runs hashcat to generate password variations by applying rule transformations to wordlists. It executes an external tool (hashcat) with potentially large-scale password generation capabilities. While it doesn't directly crack passwords, it produces artifacts used in offensive security/password cracking workflows. Severity is high because misuse could facilitate unauthorized credential attacks at scale.

From the tool's definition Generate wordlist variations using hashcat rules — triggers hashcat execution to apply rule-based transformations

Documented attack patterns abuse exactly the kind of access create_wordlist_rules gives an agent:

POLICY

How to control create_wordlist_rules

PolicyLayer is an MCP gateway — it sits between your AI agents and Hashcat MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create_wordlist_rules:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_wordlist_rules": {
      "limits": [
        {
          "counter": "create_wordlist_rules_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

create_wordlist_rules 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.

Create a free account and register Hashcat MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Hashcat MCP Server tools

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All 23 Hashcat MCP Server tools →

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Go deeper

High-risk tools in Hashcat MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create_wordlist_rules

What does the create_wordlist_rules tool do? +

Generate wordlist variations using hashcat rules. It is categorised as a Execute tool in the Hashcat 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 create_wordlist_rules? +

Register the Hashcat MCP Server MCP server in PolicyLayer and add a rule for create_wordlist_rules: 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 Hashcat MCP Server. Nothing to install.

What risk level is create_wordlist_rules? +

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

Can I rate-limit create_wordlist_rules? +

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

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

create_wordlist_rules is provided by the Hashcat MCP Server MCP server (mordavid/hashcat-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Hashcat MCP Server tool call.

Start from Hashcat MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →