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

No annotations exist, so the description carries the full behavioral burden. It does disclose the data scope (2026 remaining long weekends, 2027 highlights), which is useful, but says nothing about the return shape, whether results are static or refreshed, or locale assumptions for a zero-param tool.

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?

It is short and front-loads the data range, which is good. But the bracketed category prefix consumes roughly a third of the text without adding selection-relevant meaning, so not every fragment earns its place.

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 zero-param, output-schema-less lookup, an agent needs to know the coverage window (given) and how this differs from holiday siblings (missing). The description is adequate but leaves the routing gap unaddressed given the dense sibling set.

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?

There are zero parameters, so the schema imposes no semantic burden; per the rubric, a parameterless tool starts at baseline 4. The description adds no parameter context because none exists.

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 concrete content — 2026 remaining long weekends and 2027 calendar highlights — so the resource is identifiable. However, the leading bracket '［出國與國旅實用查詢］' is a vague category label, and the name (taiwan_holidays) is not reconciled with that travel framing. It does nothing to distinguish this from holidays siblings like life__get_holidays or travel__get_2027_long_weekends.

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?

No when-to-use guidance and no exclusions. Given several overlapping siblings (life__get_holidays, life__is_holiday, travel__get_2027_long_weekends, travel__plan_leave_2027), the description should route the agent but instead stays silent.

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