Get weather forecast from US NOAA GFS model with global coverage and high-resolution data for North America.
AI agents call gfs_forecast to retrieve information from Open Meteo without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool is purely informational, retrieving pre-computed weather forecast data. It has no side effects, cannot modify or delete data, and does not execute code or trigger external operations. Classification as Read is appropriate with high confidence.
From the tool's definition Tool retrieves weather forecast data from NOAA GFS model. Description indicates 'Get weather forecast' — a retrieval/query operation with no modification, deletion, or execution of external systems.
Attacks that exploit this kind of access
Get weather forecast from US NOAA GFS model with global coverage and high-resolution data for North America. It is categorised as a Read tool in the Open Meteo MCP Server, which means it retrieves data without modifying state.
Register the Open Meteo MCP server in PolicyLayer and add a rule for gfs_forecast: 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 Open Meteo. Nothing to install.
gfs_forecast 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 gfs_forecast 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 gfs_forecast. 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.
gfs_forecast is provided by the Open Meteo MCP server (windsornguyen/open-meteo-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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