help

THE RISK

Low Risk

Why help needs a policy

This is a read-only operation that retrieves metadata about available tools and operations without modifying, executing external operations, or affecting any domain management state. The tool simply surfaces information about capabilities, consistent with typical help/discovery endpoints.

From the tool's definition Tool name 'help' and description indicating it 'Discover available tools and operations' with a query parameter suggests information retrieval about available API operations with no side effects.

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

POLICY

How to control help

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "help": {}
  }
}

help is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Domain MCP tools

Read check_domain Check if a single domain is available for registration. Designed for parallel execution - Read generate_domain_ideas Generate domain name ideas from keywords and automatically check availability. Returns ONL

All 3 Domain MCP tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about help

What does the help tool do? +

Discover available tools and operations. Use query:. It is categorised as a Read tool in the Domain MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on help? +

Register the Domain MCP server in PolicyLayer and add a rule for help: 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 Domain MCP. Nothing to install.

What risk level is help? +

help is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit help? +

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

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

help is provided by the Domain MCP server (joachimbrindeau/domain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Domain MCP tool call.

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

CHECK YOUR STACK →