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

With no annotations, the description carries the full burden. It discloses the output attributes (amounts, application methods, official links) and scopes the data to central government subsidies, but does not describe read-only nature, data freshness, or other behavioral traits.

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 core description is a single efficient sentence, but the bracketed prefix '［台彩 發票 油價對獎］' is extraneous and front-loaded, distracting from the actual purpose without earning 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 simple two-parameter lookup with no output schema and no annotations, the description covers what the tool does and what it returns. However, it lacks any behavioral context (e.g., read-only, data source) and is marred by the unrelated prefix, leaving clear gaps.

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 description coverage is 100%, so the schema already documents both parameters. The description merely repeats the category list found in the schema and adds no new semantic detail for the keyword parameter.

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 main clause clearly states a specific verb ('查詢') and resource ('台灣中央政府民眾補助津貼'), and lists covered categories. However, the bracketed prefix '［台彩 發票 油價對獎］' is unrelated and potentially misleading, which slightly undermines clarity.

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?

The description only states what the tool does, with no when-to-use guidance, no exclusions, and no mention of alternatives. There is no indication of when this tool should be chosen over any other.

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