List all hospitals in the database with their locations. Returns hospital names, IDs, EINs, NPIs, and per-campus locations with addresses and coordinates. Use hospital IDs to filter other search tools. NOTE: This lists US HOSPITALS only — not non-US providers, independent imaging centers, ambulat...
Part of the MedRates server.
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AI agents call hospitals to retrieve information from MedRates 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 hospitals 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": {
"hospitals": {}
}
}See the full MedRates policy for all 6 tools.
These attack patterns abuse exactly the kind of access hospitals 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.
List all hospitals in the database with their locations. Returns hospital names, IDs, EINs, NPIs, and per-campus locations with addresses and coordinates. Use hospital IDs to filter other search tools. NOTE: This lists US HOSPITALS only — not non-US providers, independent imaging centers, ambulatory surgery centers, clinics, or other freestanding facilities. Returns: JSON array of hospitals with id, name, display_name, ein, npi, cms_certification_number, and locations (address, city, state, lat/lng).. It is categorised as a Read tool in the MedRates MCP Server, which means it retrieves data without modifying state.
Register the MedRates MCP server in PolicyLayer and add a rule for hospitals: 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 MedRates. Nothing to install.
hospitals 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 hospitals 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 hospitals. 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.
hospitals is provided by the MedRates MCP server (https://mcp.medrates.fyi/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 6 MedRates tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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