Look up Taiwan NHI chronic-disease continuous-prescription (慢性病連續處方箋) rules. Given an ICD-10 code or a disease name, returns whether the condition falls within the official chronic-disease scope and its dispensing limits — maximum days per dispense, maximum total medication days, and prescription...
AI agents call lookup_chronic_prescription_rule 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 returns information about Taiwan's chronic prescription rules without creating, modifying, deleting, or executing any actions. It answers reference questions about eligibility and limits. The disclaimer that 'the issuing physician must confirm' reinforces that this is informational lookup only — the tool itself makes no decisions or changes to patient records, prescriptions, or any data.
From the tool's definition Tool performs lookup operations that 'returns whether the condition falls within the official chronic-disease scope and its dispensing limits' — retrieves and queries reference data (ICD-10 codes, disease names, day limits, validity rules) with no side…
Attacks that exploit this kind of access
Look up Taiwan NHI chronic-disease continuous-prescription (慢性病連續處方箋) rules. Given an ICD-10 code or a disease name, returns whether the condition falls within the official chronic-disease scope and its dispensing limits — maximum days per dispense, maximum total medication days, and prescription validity. Use when an agent needs to know if a diagnosis qualifies for a continuous prescription and the applicable day limits. Reference only — the issuing physician must confirm the patient. 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_chronic_prescription_rule: 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_chronic_prescription_rule 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_chronic_prescription_rule 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_chronic_prescription_rule. 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_chronic_prescription_rule 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.
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