get_current_weather

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

无注解信息，描述自行说明了数据源为 Open-Meteo 且无需 API key，填补了认证和来源信息。但未说明城市不存在时的行为、数据时效性、异常处理或响应格式，行为披露仍不完整。

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?

单句描述，信息密度高，先说明核心功能，再列返回要素、数据源和鉴权要求，没有冗余内容。

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?

对于只有一个参数且无输出 schema 的简单查询工具，描述已覆盖返回内容、数据源和鉴权要求，足以让代理理解如何调用。缺少输出结构示例和失败语义，但尚不构成严重缺口。

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?

参数 schema 覆盖率为 100%，city 参数的中英文示例和最小长度已足够。描述未额外补充参数格式或约束，因此维持基线 3。

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?

描述明确使用动词“查询”和资源“指定城市的当前天气”，并列出返回的具体要素（温度、湿度、天气现象、风速），与股票、RSS、文件字数等兄弟工具完全区分。

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?

描述清楚说明该工具用于获取指定城市的实时天气，使用场景明确；同列兄弟工具均属其他领域，无需额外排除说明。但未显式提及“需要天气信息时使用”或何时不使用。

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