hourlyrainfall

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

No annotations provided, so description carries full burden. It discloses the read-only nature via API request, shows response keys and example, and explains the sole parameter. No destructive actions mentioned, which is appropriate for a read operation.

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?

Description is well-structured with sections for description, parameters, request example, response keys, and response example. It is front-loaded with purpose. Some redundancy (e.g., repeating parameter info) but overall efficient.

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 only 1 optional parameter and no annotations or output schema, the description is nearly complete. It documents the response format and includes a full example. Missing error handling or rate limits, but not critical for a simple API tool.

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 coverage is 100% for the single parameter. Description adds value by showing the parameter in the URL example and clarifying default and options ('en, tc, sc'), going beyond the schema's enum-less description.

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?

Description clearly states 'Rainfall in the Past Hour from Automatic Weather Station API Request', providing a specific verb (rainfall) and resource (automatic weather station). It distinguishes itself from siblings which appear to be other weather data types.

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?

While no explicit when-to-use/alternatives are given, the description provides a clear request example and response structure, implying usage for hourly rainfall data. Sibling names are distinct, so context is clear.

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