NREL alternative-fuel station locator. Filter by lat/lon + radius, state, zip, fuelType (BD/CNG/ELEC/E85/HY/LNG/LPG/RD), status, access, EV network. For EV: returns connector types, Level1/2/DC-fast counts, pricing, hours.
AI agents call energy.fuel-stations 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 retrieves publicly available or semi-public data about fuel station locations and characteristics. It performs queries and returns results without creating, modifying, deleting, or executing any operations that would affect system state or trigger external actions. The filtering and data-return capabilities are typical read operations.
From the tool's definition Tool description indicates it 'locates', 'filters', and 'returns' information about fuel stations and EV chargers. Operations are: filtering by geographic/fuel-type criteria, querying connector types, counts, pricing, and hours.
Attacks that exploit this kind of access
NREL alternative-fuel station locator. Filter by lat/lon + radius, state, zip, fuelType (BD/CNG/ELEC/E85/HY/LNG/LPG/RD), status, access, EV network. For EV: returns connector types, Level1/2/DC-fast counts, pricing, hours. 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 energy.fuel-stations: 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.
energy.fuel-stations 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 energy.fuel-stations 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 energy.fuel-stations. 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.
energy.fuel-stations 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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