Look up a healthcare practice by NPI number. Always fetches from the NPPES registry and augments with HIPAA Agent scan data if available. Returns provider name, specialty, address, and compliance grade. Cost: 25 credits.
Part of the HIPAA Agent server.
Free to start. No card required.
AI agents call lookup_practice to retrieve information from HIPAA Agent 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 lookup_practice 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": {
"lookup_practice": {}
}
}See the full HIPAA Agent policy for all 36 tools.
These attack patterns abuse exactly the kind of access lookup_practice 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.
Look up a healthcare practice by NPI number. Always fetches from the NPPES registry and augments with HIPAA Agent scan data if available. Returns provider name, specialty, address, and compliance grade. Cost: 25 credits.. It is categorised as a Read tool in the HIPAA Agent MCP Server, which means it retrieves data without modifying state.
Register the HIPAA Agent MCP server in PolicyLayer and add a rule for lookup_practice: 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 HIPAA Agent. Nothing to install.
lookup_practice 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 lookup_practice 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 lookup_practice. 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.
lookup_practice is provided by the HIPAA Agent MCP server (https://hipaaagent.ai/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 36 HIPAA Agent 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.