help

THE RISK

Low Risk

Why help needs a policy

This is a help/documentation tool that provides informational content to users. It has no side effects, does not query external APIs, does not modify any data, and does not execute operations. It purely returns static or quasi-static help content, making it a Read category tool with low severity risk.

From the tool's definition Tool name 'help' and description 'Get help and examples for using the weather MCP server tools' indicate it retrieves documentation and usage information without accessing live data or modifying state.

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 MCP Weather Server, 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 MCP Weather Server — 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 MCP Weather Server tools

Read get_weather Get current weather information for a location Read list_tools List all available tools with their descriptions and basic usage Read search_local_cities Search for cities in the local CSV files from the static directory. Useful for finding Fre Read search_location Search for GPS coordinates of a city or location by name using Open-Meteo geocoding API. Read stream_weather Stream weather updates for a location with periodic updates

All 6 MCP Weather Server 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? +

Get help and examples for using the weather MCP server tools. It is categorised as a Read tool in the MCP Weather Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on help? +

Register the MCP Weather Server 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 MCP Weather Server. 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 MCP Weather Server MCP server (tjarriault/mcp-weather-sample). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Weather Server tool call.

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

CHECK YOUR STACK →