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

Annotations already declare readOnly/idempotent/non-destructive/openWorld=false, so safety is covered. The description usefully adds behavior the annotations do not: the coverage restriction ('season boards cover the Northern hemisphere') and the return shape (dated sentence, rule in words, rows with source and station), plus a data-source URL.

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?

Front-loaded with the ranked resource and the four boards, and nearly every clause carries distinct information. It is a single dense paragraph, though, and the return-format and URL sentences could be trimmed or separated for faster scanning.

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?

An output schema exists, so return values need not be spelled out, and the description still summarizes them. It covers board definitions, hemisphere scope, state/source filters, and a reference link, leaving only minor gaps around pagination or ranking ties.

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 percent, so the baseline is 3, but the description genuinely extends `kind` beyond the schema's terse 'Which board' by defining what each board measures (new snow last 7 days, days ≥ 8 in since Oct 1, etc.) and clarifies the measured-only behavior of sourceOnly. It does not add meaning for `limit`.

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?

States a specific verb+resource (resorts ranked on season boards) and enumerates the four `kind` values with their exact measurement rules, so the agent can distinguish it from siblings like compare_resorts or get_season_stats without opening the schema.

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 'answers a dated sentence' framing and the nature of the boards, but no explicit when-to-use or when-not guidance is given, and no sibling tool (e.g. compare_resorts, find_powder) is named as the alternative path.

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