Queries broadband providers and advertised speeds at a census block from FCC Form 477 data (as of June 2021). Answers "which ISPs serve this location and what speeds do they offer?" — the core tool for address-level broadband lookup. Requires a 15-digit census block FIPS code; use fcc_geocode_blo...
Part of the Fcc Broadband Mcp Server server.
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AI agents call fcc_search_availability to retrieve information from Fcc Broadband Mcp Server 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 fcc_search_availability 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": {
"fcc_search_availability": {}
}
}See the full Fcc Broadband Mcp Server policy for all 9 tools.
These attack patterns abuse exactly the kind of access fcc_search_availability 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.
Queries broadband providers and advertised speeds at a census block from FCC Form 477 data (as of June 2021). Answers "which ISPs serve this location and what speeds do they offer?" — the core tool for address-level broadband lookup. Requires a 15-digit census block FIPS code; use fcc_geocode_block to convert coordinates first. Data reflects ISP-reported availability at the block level, which may overstate actual coverage for some addresses.. It is categorised as a Read tool in the Fcc Broadband Mcp Server MCP Server, which means it retrieves data without modifying state.
Register the Fcc Broadband Mcp Server MCP server in PolicyLayer and add a rule for fcc_search_availability: 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 Broadband Mcp Server. Nothing to install.
fcc_search_availability 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 fcc_search_availability 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 fcc_search_availability. 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.
fcc_search_availability is provided by the Fcc Broadband Mcp Server MCP server (@cyanheads/fcc-broadband-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 9 Fcc Broadband Mcp Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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