AI agents call weather.alerts to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves publicly available weather alert information from the National Weather Service. It performs a read-only operation with no ability to modify, delete, or execute actions. The data retrieved is informational only, presenting no financial, destructive, or execution risk. Severity is low because weather data retrieval poses minimal security risk even if misused by an agent.
From the tool's definition Tool name 'weather.alerts' and description 'Live US National Weather Service active alerts (watches/warnings/advisories) for a point' indicate retrieval of weather alert data with no modification or side effects.
Attacks that exploit this kind of access
Live US National Weather Service active alerts (watches/warnings/advisories) for a point (. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for weather.alerts: 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. Nothing to install.
weather.alerts 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 weather.alerts 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 weather.alerts. 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.
weather.alerts is provided by the MCP server (@2sio/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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