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

No annotations are provided, so the description carries the full disclosure burden. It implies a pure computation (URL construction) but never states that it has no side effects, what the return shape is (one URL per engine, an array, an object?), or whether unsupported operators for engines like Baidu are dropped or error out.

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?

A single front-loaded sentence with the purpose first and the parameter inventory in a compact parenthetical. Nothing is wasted and no preamble is present.

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?

With six parameters, no annotations and no output schema, the definition covers intent and parameter meaning but omits the return format and engine-specific operator caveats. Adequate to call the tool, but an agent still has to guess what it receives back.

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%, so the description must compensate, and it largely does: 關鍵字→q, 完全符合→exact, 排除字→exclude, 限定網站→site, 檔案類型→filetype, 時間→time. This maps all six parameters to their meaning. It stops short of 5 because it gives no format hints (multiple values, delimiters) beyond what the enum already supplies.

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?

States a specific verb (產生 / generate) and resource (進階搜尋網址 / advanced search URLs) and names the five target engines, so the agent knows exactly what comes out. It does not explicitly distinguish itself from the sibling search_operators, which is a plausible point of confusion, keeping it below a 5.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives such as search_operators. The agent must infer that this is the tool for producing ready-to-click URLs rather than explaining syntax.

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