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

No annotations are provided, so the description carries the full behavioral burden. It discloses only a vague ranking criterion and 'PRO' status; it does not explain authentication requirements, rate limits, ordering, forecast horizon for 'next,' or how many stations are 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?

The description is very short and front-loaded, with no wasted sentences. However, the two fragments and unexplained 'PRO' make it under-specified rather than optimally concise.

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 tool with no annotations and no output schema, the description should explain what 'next WBGT' means, how results are ranked, and how limit affects output. It omits these essentials, leaving the agent with only a high-level ranking hint.

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 50%: access_token is described in the schema, but limit is undocumented in both schema and description. The description does not compensate by explaining what limit controls, its default, or its valid range.

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 identifies a resource ('Stations') and ranking criterion ('highest next WBGT value'), but lacks a clear operation verb such as list or retrieve. It does not distinguish the tool from siblings wbgt_sample or wbgt_search, and 'next WBGT' is ambiguous without further explanation.

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 guidance on when to use this tool versus wbgt_sample or wbgt_search, nor any stated prerequisites or exclusions. 'PRO' hints at a subscription tier but does not tell the agent how or when to select this tool.

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