Lightweight reverse geocode: return just the county and state for a US latitude/longitude (decimal degrees) — county FIPS + name, state FIPS + code + name. Convenience wrapper over the FCC block-find service for when you only need the containing county/state, not the full block record.
Part of the Fcc server.
Free to start. No card required.
AI agents call county_for_point to retrieve information from Fcc without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though county_for_point only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"county_for_point": {}
}
}See the full Fcc policy for all 23 tools.
These attack patterns abuse exactly the kind of access county_for_point gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Lightweight reverse geocode: return just the county and state for a US latitude/longitude (decimal degrees) — county FIPS + name, state FIPS + code + name. Convenience wrapper over the FCC block-find service for when you only need the containing county/state, not the full block record.. It is categorised as a Read tool in the Fcc MCP Server, which means it retrieves data without modifying state.
Register the Fcc MCP server in PolicyLayer and add a rule for county_for_point: 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 Fcc. Nothing to install.
county_for_point 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 county_for_point 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 county_for_point. 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.
county_for_point is provided by the Fcc MCP server (https://gateway.pipeworx.io/fcc/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 23 Fcc tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.