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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and openWorldHint=false, so the safety profile is covered. The description adds only the day cap, which is already in the schema as maximum:10, and says nothing about data freshness, availability ('available' is vague), or units.

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?

A single sentence that front-loads the verb and resource and then lists the returned data, with no filler or redundancy.

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?

With no output schema, the description does well to enumerate the forecast dimensions returned. However, for a tool sitting among several forecast/conditions siblings with a fully undocumented parameter set, it omits selection guidance and the resort identifier format, leaving real gaps.

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 description coverage is 0%, so the description carries the full burden, yet it only loosely references the 'days' parameter via 'up to 10 requested days' and says nothing about 'resort' (expected identifier format, name vs. id, or how it relates to search_resorts). The required resort parameter is left entirely undefined.

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 (Get) and resource (forecast) and enumerates the forecast contents (snow, temperature, freezing level, wind-hold risk), which is genuinely informative. It does not distinguish itself from close siblings like get_extended_outlook, get_conditions, or best_time_to_go, so an agent must guess which forecast tool to pick.

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?

There is no statement of when to use this tool versus the many overlapping siblings (get_extended_outlook, get_conditions, best_time_to_go, get_snow_reports). The 'up to 10 requested days' clause hints at a short-range use case but never makes the boundary explicit.

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