Look up a US-registered aircraft by tail number (N-number, e.g. N757F) or icao24 Mode-S hex (e.g. aa3487). Pass exactly one. Returns make/model/owner/operator + the icao24 that links to live ADS-B flight-tracking. ~307k US airframes (OpenSky, CC-BY-SA).
AI agents call aircraft.lookup 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 publicly available aircraft registration information from OpenSky (CC-BY-SA licensed). It performs a lookup operation with no ability to modify, delete, or execute actions. While the data returned could theoretically be used for surveillance purposes, the tool itself is purely Read—it retrieves existing data without side effects.
From the tool's definition Look up a US-registered aircraft by tail number or icao24 Mode-S hex. Returns make/model/owner/operator + icao24 for flight-tracking. No side effects; purely retrieves public aircraft registration data.
Attacks that exploit this kind of access
Look up a US-registered aircraft by tail number (N-number, e.g. N757F) or icao24 Mode-S hex (e.g. aa3487). Pass exactly one. Returns make/model/owner/operator + the icao24 that links to live ADS-B flight-tracking. ~307k US airframes (OpenSky, CC-BY-SA). 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 aircraft.lookup: 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.
aircraft.lookup 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 aircraft.lookup 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 aircraft.lookup. 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.
aircraft.lookup 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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