Get weather information for a city using OpenWeatherMap API.
AI agents call get_weather to retrieve information from FastMCP Multi-Tool Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves weather data for informational purposes only. It does not create, modify, delete, or execute any operations. There is no ability to alter system state, delete data, or perform financial transactions. The blast radius of misuse is minimal—an agent could only retrieve excessive weather data, which poses no security risk.
From the tool's definition Tool name 'get_weather' and description 'Get weather information for a city' indicate data retrieval with no modification or side effects. OpenWeatherMap API calls are read-only queries.
Attacks that exploit this kind of access
Get weather information for a city using OpenWeatherMap API. It is categorised as a Read tool in the FastMCP Multi-Tool Server MCP Server, which means it retrieves data without modifying state.
Register the FastMCP Multi-Tool Server MCP server in PolicyLayer and add a rule for get_weather: 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 FastMCP Multi-Tool Server. Nothing to install.
get_weather is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_weather 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.
Set action: deny in the PolicyLayer policy for get_weather. 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.
get_weather is provided by the FastMCP Multi-Tool Server MCP server (rt0120-ramco/mcp-py). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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