Active in-flight weather hazard advisories (SIGMETs/AIRMETs) from the NOAA Aviation Weather Center. Returns current advisories over a 1-24h window, optionally filtered by hazard (CONVECTIVE, TURB, ICE, IFR, MTN OBSCN, ASH). Each carries issuing office, type, hazard, severity, valid-from/to, altit...
AI agents call aviation.sigmet 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 is a data retrieval tool that queries and presents publicly available aviation weather hazard information. It has no side effects—no data is created, modified, deleted, or executed. Even though the server operates on a pay-per-call model in USDC, the tool itself performs only a Read operation (fetching and filtering existing NOAA advisories).
From the tool's definition The tool description states it 'Returns current advisories' and 'Keyless, public-domain.' It retrieves weather data from NOAA without modifying, deleting, or executing operations.
Attacks that exploit this kind of access
Active in-flight weather hazard advisories (SIGMETs/AIRMETs) from the NOAA Aviation Weather Center. Returns current advisories over a 1-24h window, optionally filtered by hazard (CONVECTIVE, TURB, ICE, IFR, MTN OBSCN, ASH). Each carries issuing office, type, hazard, severity, valid-from/to, altitude band (ft MSL), movement (dir/speed), and raw bulletin. Keyless, public-domain. The active-hazard layer beyond aviation.metar/taf. Not for navigation. 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 aviation.sigmet: 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.
aviation.sigmet 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 aviation.sigmet 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 aviation.sigmet. 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.
aviation.sigmet 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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