get_forecast

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

With no annotations provided, the description carries full burden. It only states that the tool fetches weather information, but discloses no behavioral traits such as data source, freshness, or limitations. There is no mention of side effects or required permissions.

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 description is short and front-loaded with the main sentence, but the docstring format adds a little structure. However, it is under-specified for a tool with no annotations and an output schema. Every sentence is earned but more detail would be beneficial.

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?

Given the tool has one required parameter and an output schema (not shown), the description provides the basic purpose. It does not explain the return value beyond ':return: 天气信息', which is insufficient for understanding the expected output without viewing the schema. Overall adequate but with 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 0%, so the description must compensate. The ':param city: 城市名称' line merely repeats the parameter name and title without adding formatting constraints, allowed values, or input examples. This adds minimal value beyond the schema.

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 description '获取天气信息' (Get weather information) clearly states the verb (获取/get) and resource (天气信息/weather information), matching the tool name 'get_forecast'. While it is clear, it does not differentiate from any sibling tools, as none are listed.

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 provides no guidance on when to use this tool versus alternatives, nor does it mention when not to use it. There is no context about prerequisites or typical use cases.

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