Search for diagnostic reports (e.g., lab results, HbA1c tests)
AI agents call search_diagnostic_reports to retrieve information from FHIR MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves healthcare data with no side effects. While the blast radius is non-trivial (unauthorized access to sensitive FHIR diagnostic data could expose patient medical information), the tool itself performs only read operations.
From the tool's definition Tool name is 'search_diagnostic_reports' and description states it 'Search[es] for diagnostic reports' — this is a retrieval operation.
Attacks that exploit this kind of access
Search for diagnostic reports (e.g., lab results, HbA1c tests). It is categorised as a Read tool in the FHIR MCP Server MCP Server, which means it retrieves data without modifying state.
Register the FHIR MCP Server MCP server in PolicyLayer and add a rule for search_diagnostic_reports: 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 FHIR MCP Server. Nothing to install.
search_diagnostic_reports 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 search_diagnostic_reports 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 search_diagnostic_reports. 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.
search_diagnostic_reports is provided by the FHIR MCP Server MCP server (jcafazzo/fhir-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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