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

No annotations are provided, so the description carries the full burden. It discloses the dataset scope (2026–2027 key titles) and some returned fields, which is useful behavioral context, but omits pagination behavior, result limits, sorting, and authentication requirements.

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 definition is a single dense sentence that front-loads the database label and then states the listing behavior, contents, and filters. It is efficient, though the bracketed tag adds minor extra framing before the main verb.

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 six-parameter tool with no annotations, no output schema, and 0% schema coverage, the description supplies useful purpose and partial filter semantics. It remains incomplete because it does not explain 'upcoming', date formats, enum semantics, pagination, or sibling differentiation.

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%, so the description must compensate. It maps filter categories to five of the six parameters (type, platform, status, and the date range via from/to), but does not explain the sixth parameter 'upcoming', date formats, or the meaning of enum values.

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 gives a specific verb ('列出') and resource ('電影、影集、動畫、劇場版'), plus a clear scope (2026–2027 重點 titles). It does not, however, distinguish this tool from nearby siblings such as screen__release_calendar, screen__lookup_any_title, or screen__get_title, so it falls short of a 5.

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?

It states that results can be filtered by type, platform, status, and date, but gives no guidance on when to choose this tool over alternatives like screen__release_calendar or screen__lookup_any_title. There are no when/when-not/exclusion instructions.

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