get_news_by_date

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

没有任何注释，描述承担了行为透明度的全部责任。描述揭示了返回值结构（标题、平台、排名）、参数默认值（limit=50，include_url=false）和date_range的多种输入格式，但未说明任何副作用、权限要求或错误处理。此外，未明确声明是只读操作（尽管明显）。在无注释的情况下，提供的信息较充分但仍有缺口。

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?

描述开头一句话给出核心用途，随后用结构化列表逐项说明参数，末尾说明返回格式。信息密度高，无冗余。虽略长但每句话都有价值，且前部加载了关键信息。

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?

工具涉及4个参数，有输出schema，描述本身包含了返回字段（标题、平台、排名），基本覆盖了调用所需的信息。但没有提供示例调用或错误场景，对于较为复杂的date_range格式虽强制说明了类型未给具体示例，但已足够。

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描述覆盖率为0%，描述完美补充了所有4个参数的具体语义：date_range的多种格式、platforms的用途、limit的默认和最大值、include_url的目的。全部参数都获得清晰说明，远超schema类型信息，使代理能正确调参。

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?

描述明确说明“获取指定日期的新闻数据，用于历史数据分析和对比”，精确地指特定时间范围的新闻检索，与兄弟工具如get_latest_news、get_trending_topics等形成清晰区分，帮助代理识别工具的独特用途。

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?

描述暗示了历史分析的场景，但未明确说明与其他搜索/报告工具（如search_news、aggregate_news）的边界，也未提及何时不使用该工具。虽然用途清晰有余，但缺乏排除性指导，未达到4分。

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