Get the latest METAR observation from the settlement station for one city.
AI agents call get_station_observation to retrieve information from Weather Edge MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves current weather observation data from a specific station. It performs a pure read operation with no side effects, state changes, or external system modifications. The only input is a city identifier, and the output is existing observational data. Even if used inappropriately by an AI agent, the worst outcome would be accessing publicly available weather information, which poses minimal risk.
From the tool's definition Tool name 'get_station_observation' and description 'Get the latest METAR observation' indicate a retrieval operation. METAR (Meteorological Aerodrome Report) is a standard weather data format.
Attacks that exploit this kind of access
Get the latest METAR observation from the settlement station for one city. It is categorised as a Read tool in the Weather Edge MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Weather Edge MCP Server MCP server in PolicyLayer and add a rule for get_station_observation: 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 Weather Edge MCP Server. Nothing to install.
get_station_observation 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_station_observation 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_station_observation. 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_station_observation is provided by the Weather Edge MCP Server MCP server (rjw34/weather-edge-mcp). 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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