Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It usefully discloses the effective date (113-07-01), the scope (11 situations), and that the guide covers prescription eligibility and process, but it never states that this is a read-only lookup or describes what the response contains.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The bracket tag, then the scope/effective date, then the value list is a sensible front-loaded order, and every element earns its place. It is somewhat dense in one block, but no sentence is padding.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a single-optional-parameter read tool with no output schema and no annotations, the description supplies the topic, effective date, content coverage, all enum values, and default behavior. Only a brief note on the return shape would make it fully self-contained.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0% and the schema has no enum, so the description is the only source of valid values. It provides the complete value list (remote, acute_post, chronic_plan, ltc, family_doc, home_care, terminal, mobility, prison, disaster, intl) each with a Chinese gloss, and a default behavior when omitted ('不填則列出全部'). This compensates fully for the empty schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific resource (Taiwan teleconsultation / 通訊診察 eligibility) and specific content (11 special situations, whether prescriptions may be issued, process), which is far more than the name alone. It is clearly distinguishable from wellness siblings like digital_wellness_guide or crisis_lines.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

It explains the context well by enumerating all eleven applicable situations with their meanings, so an agent knows which case maps to which value. It does not, however, state when to use this tool versus alternatives or any exclusions, so it stops short of full when/when-not guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.