get_weather

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

With no annotations, the description carries the full behavioral burden. 'Fetch' implies a read operation and Open-Meteo identifies an external source, but the description does not disclose units, timezone, data variables, rate limits, authentication needs, or error behavior.

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 single sentence is front-loaded and contains no filler. It is perhaps too terse for the tool's parameter set, but it is structurally clean and 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?

For a four-parameter tool with no annotations, no output schema, and only partial schema descriptions, the description is under-specified. It should explain optional parameters, returned data scope, units, and any relevant source constraints to be 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 only 50%: latitude and longitude are documented, but past_days and forecast_days have no descriptions beyond their ranges and defaults. The description does not compensate for this gap by explaining what those optional parameters mean or how they affect the result.

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 states a specific verb and resource: fetch daily weather, including past and forecast data from Open-Meteo for a location. It is clear enough to distinguish this from the planting/observation siblings, though it does not specify which weather variables are returned.

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 saying the tool fetches past and forecast daily weather for a location. There is no explicit when-to-use guidance, no exclusions, and no alternatives to choose between, so it is minimally viable rather than instructive.

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