Search for a patient by demographics
AI agents call find_patient to retrieve information from Agent Care MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves patient data based on demographic criteria. It is a Read operation (search/query) with no side effects. However, severity is high because it accesses Protected Health Information (PHI) in a healthcare context. Unauthorized or misdirected searches could expose sensitive patient records. The confidence is high because the description and name clearly indicate a retrieval operation.
From the tool's definition Tool name is 'find_patient' and description states 'Search for a patient by demographics' — a query operation with no modification.
Attacks that exploit this kind of access
Search for a patient by demographics. It is categorised as a Read tool in the Agent Care MCP MCP Server, which means it retrieves data without modifying state.
Register the Agent Care MCP server in PolicyLayer and add a rule for find_patient: 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 Agent Care MCP. Nothing to install.
find_patient 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 find_patient 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 find_patient. 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.
find_patient is provided by the Agent Care MCP server (polya20/agentcare-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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