Look up ICD-10 diagnosis codes by code or search term
AI agents call lookup_icd10 to retrieve information from Medical Billing MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple lookup/search of medical coding data. It has no side effects, does not create, modify, or delete data, and does not execute commands or move money. It is purely informational retrieval, consistent with the Read category. While medical coding is sensitive in a healthcare context, the risk is low because the tool itself cannot cause harm—it merely returns standardized coding reference data.
From the tool's definition Tool name 'lookup_icd10' and description 'Look up ICD-10 diagnosis codes by code or search term' indicate a read-only query operation that retrieves medical coding information without modifying data or triggering external actions.
Attacks that exploit this kind of access
Look up ICD-10 diagnosis codes by code or search term. It is categorised as a Read tool in the Medical Billing MCP MCP Server, which means it retrieves data without modifying state.
Register the Medical Billing MCP server in PolicyLayer and add a rule for lookup_icd10: 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 Medical Billing MCP. Nothing to install.
lookup_icd10 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_icd10 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_icd10. 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_icd10 is provided by the Medical Billing MCP server (kustode-ce/medical-billing-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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