Weather for a Turkish province

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

Annotations already declare readOnlyHint and openWorldHint, so safety and external-dependency profile are covered. The description adds genuinely useful operational context — free, no API key required, external provider Open-Meteo — but says nothing about units (metric vs imperial), output language, or what happens when a province/district name is unrecognized.

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?

One sentence, front-loaded with the primary capability, with the provider caveat trailing as parenthetical. Nothing is wasted and nothing needs trimming.

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 read-only tool with full schema coverage and annotations, most needs are met. The remaining material gaps are the shape of the result (no output schema, and the description doesn't say whether it returns temperature, condition text, wind, or units), which directly affects how an agent presents the answer.

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%, so province, district, and the 1–7 day range with a default of 3 are already documented in the schema. The description only reinforces the province/district concept and the 'short daily forecast' nature of the days parameter, adding no format or validation detail beyond structured fields.

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?

Names a specific verb (returns current weather plus a short daily forecast) and a specific resource (a Turkish province or district), plus the upstream source (Open-Meteo). No sibling tool overlaps on weather, so explicit differentiation isn't required, but the description could have said 'the only weather tool' to be airtight.

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 naming the resource rather than stated: an agent infers it should call this for weather queries. There is no guidance on when not to use it (e.g. historical weather, marine/sea conditions, or hours-level forecasts it doesn't provide), and no pointer to list_provinces/find_district for resolving names even though those siblings obviously feed this tool.

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