find_warmest_day

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

With no annotations, the description must carry the full burden. It states the purpose but does not disclose the return format (e.g., whether it returns a date, day name, or temperature), how ties are broken, or what happens if no forecast is available.

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, compact sentence with no redundant or extraneous information. It is highly efficient and easy to parse.

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?

Despite the sibling tools providing context, the description lacks essential details such as the output schema, return type, and edge-case behavior. It is sufficient for a simple use case but incomplete for robust agent decision-making.

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?

The schema provides parameter names and types but no descriptions. The description does not explain that 'days' controls how many forecast days are considered or what values are acceptable (e.g., must be positive). This leaves ambiguity for the agent.

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 clearly states a specific action ('Find') and a specific resource ('the warmest forecast day for a city'). It is distinguishable from siblings like get_weather_forecast (which returns all days) and compare_weather (which compares weather across cities).

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?

No guidance is given on when to use this tool versus alternatives. For example, it does not mention that this is useful when a user asks for the warmest day or that it should be used instead of get_weather_forecast when only the maximum is needed.

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