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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false, and destructiveHint=false, so safety is covered. The description adds one genuinely useful behavioral caveat — shading is only modelled 'where DEM coverage exists' — but says nothing about cost, caching, or the shape of what is returned.

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 front-loaded sentence with no filler, and the conditional limitation is placed at the end where it reads naturally. It is efficient, though the compression contributes to the vagueness noted elsewhere.

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 and 0% parameter description coverage, the description carries the full explanatory burden and does not meet it: an agent still cannot tell what a 'window' looks like in the response, what date defaults to, or what happens outside DEM coverage. Only the annotation layer is 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 description coverage is 0% across two parameters (resort, date). The description supplies no parameter meaning at all: neither the accepted resort identifier form nor the expected date format is stated, so the schema gap is left entirely unpatched.

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 names a specific modelled output (sun and shade windows across eight slope aspects), which is more than a restatement of the title. However, 'sun and shade windows' is jargon that an agent cannot map to a concrete result, and the description does not distinguish this from siblings like best_time_to_go or plan_my_day that plausibly overlap in intent.

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 when-to-use guidance, no prerequisites, and no mention of any alternative tool. An agent has no signal for choosing this over best_time_to_go or get_conditions.

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