Get anime characters

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

Annotations already declare readOnlyHint=true, and the 'List' verb aligns with that. The description adds useful scope around roles and voice actors, but does not disclose extra behavioral traits like pagination, missing-id handling, or malformed-data behavior. Since output schema exists, this is acceptable though minimal.

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, purposeful sentences with no filler. The first sentence states the action and content, and the second gives actionable guidance for obtaining the required input. Every sentence earns its place.

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?

This is a simple one-parameter tool, and the description leaves no important gap: it identifies the target resource, the result's contents, and how to acquire the required mal_id. The output schema and annotations carry the remaining return-value and safety context.

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?

The schema already fully documents the only parameter as 'MyAnimeList numeric ID.'. The description's 'by mal_id' reinforces this but does not add new constraints, units, examples, or meaning beyond what the schema provides. With 100% schema coverage, the baseline of 3 is appropriate.

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 ('List'), a specific resource ('characters of an anime'), and the key output contents ('roles and Japanese voice actors'). The qualifier 'by mal_id' and the pointer to 'search_anime' make it easy to distinguish from manga, people, or general-character tools.

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?

The description explicitly directs the agent to obtain the required id from 'search_anime', which is a concrete usage prerequisite. It does not name the manga equivalent as an alternative, but the anime-specific wording and id source provide enough selection context.

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