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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered. The description adds behavioral context beyond that: ranks are one-based and internal heat scores are deliberately not returned, which prevents an agent from promising that field. It stops short of describing pagination or ordering guarantees.

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 sentences, zero filler. The core purpose and rank detail come first, with the alternative-tool routing tucked into the second sentence where it belongs.

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?

No output schema exists, so the description has to carry return-value information, and it does so for the two attributes that matter most (rank semantics and the absence of heat scores). It does not spell out the full event payload shape, which is the only remaining gap for a single-optional-param read tool.

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 100% and the single 'limit' parameter is fully documented with bounds and default in the schema. The description only indirectly touches it via 'Top 10', adding no syntax or format detail. Baseline 3 is correct when the schema does the heavy lifting.

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 and resource ('Get the current AIHOT Top 10') plus the shape of the payload (each event's one-based rank). It explicitly positions itself against the sibling aihot_get_latest, so an agent can disambiguate without opening either 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?

Gives both the positive trigger ('what is hot now') and a secondary use case (discovering valid story public IDs), and names the alternative tool plus the condition that selects it ('use aihot_get_latest for a chronological news list'). Nothing is left to inference.

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