Look up an ICD-10 diagnosis code and get its description.
AI agents call icd10_lookup to retrieve information from MCP Healthcare Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves medical coding information (ICD-10 descriptions) from a database. It performs a lookup operation with no side effects—it neither modifies data, executes arbitrary code, deletes information, nor commits financial transactions. The blast radius of misuse is minimal; an agent querying for diagnosis codes cannot harm systems or data. This is a classic Read operation.
From the tool's definition Tool name 'icd10_lookup' and description 'Look up an ICD-10 diagnosis code and get its description' indicate a query/retrieval operation with no modification, deletion, or execution of code.
Attacks that exploit this kind of access
Look up an ICD-10 diagnosis code and get its description. It is categorised as a Read tool in the MCP Healthcare Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Healthcare Server MCP server in PolicyLayer and add a rule for icd10_lookup: 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 MCP Healthcare Server. Nothing to install.
icd10_lookup 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 icd10_lookup 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 icd10_lookup. 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.
icd10_lookup is provided by the MCP Healthcare Server MCP server (shinegami-2002/mcp-healthcare-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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