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liuweihongliuxinyu

weather-mcp-server

获取天气预报

get_forecast

Retrieve the weather forecast for any city, including daily high and low temperatures and weather description, for up to 3 days.

Instructions

查询一个城市未来几天的天气预报,包括每日最高/最低温度和天气描述。支持中文和英文城市名。

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
cityYes城市名称,支持中文和英文
daysNo预报天数(1-3),默认为 3
Behavior2/5

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

No annotations are provided, so the description must convey behavioral traits. It explains output includes highs/lows and weather description but omits details like input validation (e.g., invalid city handling), rate limits, authorization requirements, or whether it is a read-only operation. This is insufficient for a tool without annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences long, front-loaded with the core purpose, and contains no redundant information. Every sentence is functional and contributes to understanding.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity and full schema coverage, the description covers the main functionality. However, it lacks details on return format (e.g., temperature units, structure) and error handling for invalid cities. This is adequate but not comprehensive.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the schema already documents both parameters. The description adds value by noting that city names can be in Chinese or English, but does not elaborate on the 'days' parameter beyond what the schema provides (range 1-3, default 3). Baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: querying a city's weather forecast for the next few days, including daily high/low temperatures and weather description. It also notes support for Chinese and English city names, distinguishing it from sibling tools like get_current_weather.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description does not explicitly provide guidance on when to use this tool versus alternatives (get_air_quality, get_current_weather). Usage context is implied by the name and description but lacks explicit differentiation or exclusion criteria.

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

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