Every US public K-12 school (~102k, NCES Common Core of Data). Search by name/district (partial), state, city, zip, or exact 12-digit NCES id. Returns address, level, type, charter/magnet/virtual flags, enrollment, grade span.
AI agents call edu.school-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 public educational institution metadata from the National Center for Education Statistics (NCES) database and returns structured information about schools. It performs read-only lookups with no side effects, no code execution, no data modification, and no financial transactions.
From the tool's definition Tool description explicitly states it 'Search by name/district (partial), state, city, zip, or exact 12-digit NCES id.
Attacks that exploit this kind of access
Every US public K-12 school (~102k, NCES Common Core of Data). Search by name/district (partial), state, city, zip, or exact 12-digit NCES id. Returns address, level, type, charter/magnet/virtual flags, enrollment, grade span. 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 edu.school-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.
edu.school-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 edu.school-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 edu.school-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.
edu.school-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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