Browse Taiwan NHI preventive-care and screening services — adult health checks, the major cancer screenings (breast, cervical, colorectal, oral, lung LDCT), prenatal care, child preventive health, and child dental fluoride / pit-and-fissure sealant programs. Returns each service
AI agents call lookup_preventive_service to retrieve information from Opdstar Nhi without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about preventive health services offered by Taiwan's National Health Insurance. It performs a read-only query operation with no side effects, no data modification, no code execution, and no financial impact. The lowest severity applies because misuse would only expose publicly intended health service information.
From the tool's definition Tool description states 'Browse Taiwan NHI preventive-care and screening services' and 'Returns each service' — pure data retrieval with no modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
Browse Taiwan NHI preventive-care and screening services — adult health checks, the major cancer screenings (breast, cervical, colorectal, oral, lung LDCT), prenatal care, child preventive health, and child dental fluoride / pit-and-fissure sealant programs. Returns each service. It is categorised as a Read tool in the Opdstar Nhi MCP Server, which means it retrieves data without modifying state.
Register the Opdstar Nhi MCP server in PolicyLayer and add a rule for lookup_preventive_service: 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 Opdstar Nhi. Nothing to install.
lookup_preventive_service 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_preventive_service 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_preventive_service. 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_preventive_service is provided by the Opdstar Nhi MCP server (tatsuju/opdstar-nhi-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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