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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds provenance context ('sourced') and scope ('12-month'), but says nothing about behavior when an area is not seeded, is unknown, or has no season data, nor about response size.

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?

Two short sentences, payload first, identifier format second. No filler and nothing important buried.

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 two-parameter read-only lookup with no output schema, the description covers what is returned and how to key the request. It stops short of noting failure modes or the slug source (e.g. get_atlas_overview), which is the only real gap.

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?

With 0% schema coverage the description has to carry the burden, and it does: it tells the agent both arguments are atlas slugs and gives a concrete example (indonesia/komodo). Minor ambiguity remains because the example is written as a combined path while the schema has two separate string parameters, and it does not say where to obtain the slugs.

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 concrete resource and payload: 12-month seasons and species windows for a seeded area. That clearly separates it from siblings such as get_area_safety (safety) or check_suitability (date-specific checks), though it never explicitly contrasts itself with them.

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 or when-not guidance, no mention of alternatives like check_suitability or get_latest_conditions. The only guidance is about identifier format, which is parameter help rather than usage context.

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