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 that output is keyed to 'official release periods'; it says nothing about return structure, ordering, pagination, or coverage limits. For a read-only lookup the safety stakes are low, but the behavioral disclosure is still thin.

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 efficient sentence that front-loads the action and resource. The bracketed source label ('［NEW玩具情報站］') is mild noise but does not hinder comprehension.

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 simple monthly lookup the core intent is conveyed, but with no output schema, 50% param coverage, and no siblings/alternative guidance, an agent still lacks enough to call it confidently versus neighboring toy tools.

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 50%: 'month' has a YYYY-MM hint while 'brand' relies solely on its enum. The description alludes to the month concept ('某個月') but adds no format or filtering semantics, and never mentions the brand parameter or how it narrows results.

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: '取得某個月的扭蛋與公仔發售表' (retrieve the gashapon/figure release list for a given month). Scope and data source ('依官方發售時期') are clear. It does not, however, differentiate itself from siblings like toys__global_toy_calendar or toys__official_toy_news.

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 phrasing ('for a certain month'), so an agent can infer the trigger. But there is no explicit when-to-use, no exclusion conditions, and no routing to the closest sibling (global_toy_calendar), leaving selection between calendar tools to inference.

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