get_weather_forecast

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

No annotations are provided, so the description must carry the full burden. It states it returns 'detailed hourly weather forecast' but doesn't disclose data sources, units, location matching behavior, potential errors, or any other operational details. It adds little beyond the core purpose.

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 a single, well-structured sentence that front-loads the core action and object. It is appropriately concise with no filler.

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?

For a simple weather tool with schema-covered parameters and no output schema, the description provides adequate context to understand the tool's purpose. However, it lacks any mention of return value shape, units, or edge cases, making it minimally viable but not richly complete.

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% with both 'location' and 'hours' having descriptions. The description's mention of 'hourly' loosely maps to the hours parameter but doesn't add format or constraints beyond what the schema already provides. Baseline 3 applies.

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 a specific verb ('Get'), a resource ('weather forecast'), and scope ('hourly', 'UK location'). It distinctly separates this tool from siblings like get_travel_info and get_outfit_recommendation by domain.

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?

Usage is implied by the name and description; it's obviously for weather forecasts. However, there is no explicit guidance on when to use it vs alternatives, nor any exclusions or prerequisites beyond the required location parameter.

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