Get marine weather forecast including wave height, wave period, wave direction and sea surface temperature.
AI agents call marine_weather 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 retrieves weather forecast data without side effects. It queries the Open-Meteo weather API to return marine conditions and returns the result to the user. There is no capability to modify data, execute code, delete information, or commit financial transactions. The blast radius of misuse is minimal—an agent could only retrieve unwanted weather data, which has no destructive impact.
From the tool's definition Tool name is 'marine_weather' and description states it gets marine weather forecast data (wave height, wave period, wave direction, sea surface temperature) — purely informational retrieval with no modification, deletion, or execution of external operations.
Attacks that exploit this kind of access
Get marine weather forecast including wave height, wave period, wave direction and sea surface temperature. 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 marine_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 Open Meteo. Nothing to install.
marine_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 marine_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 marine_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.
marine_weather 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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