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

描述仅一句话，未透露任何行为细节，如是否只读、是否需要认证、速率限制等。没有注释，描述未承担披露行为的责任。

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?

描述仅一句话，无冗余信息，直接说明核心功能。结构紧凑，每个词都有意义。

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?

工具参数较多（5个），有枚举和日期范围，且无输出模式。描述未说明返回数据格式、使用注意事项或参数组合效果，信息不完整。

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?

输入模式描述覆盖100%，每个参数已有详细描述。描述本身未增加额外参数语义，根据规则基线为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?

描述明确说明工具用于获取A股历史行情数据，动词“获取”表示检索，资源明确为历史行情数据。与兄弟工具（如实时行情、分钟数据）区分明显。

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?

描述未提供何时使用此工具或何时应使用替代工具的指导。兄弟工具有多个相关工具，但描述中没有对比或使用场景说明。

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