get_anime_details

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

With no annotations provided, the description must carry the full behavioral disclosure. It only indicates a read operation ('Fetch') but does not explain return format, pagination, permissions, rate limits, or side effects. The optional 'fields' hint is the only extra detail.

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 a single, front-loaded sentence with no fluff. It is appropriately short for a simple tool, though the brevity sacrifices useful context.

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?

The tool has no output schema and relies on the description for completeness. However, the description does not explain what 'details' are included, what fields are available, or how it differs from 'get_anime'. This makes it incomplete for an agent deciding whether and how to use it.

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 provides minimal descriptions for both parameters ('MyAnimeList anime ID' and 'MAL response fields'). The description adds that field selection is optional but fails to explain what valid 'MAL response fields' are, leaving agents to guess. Schema coverage is only 50%, so the description should compensate but does not.

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 clearly states the action ('Fetch') and resource ('details for one anime'), and mentions the optional 'fields' selection. However, it does not distinguish itself from the sibling tool 'get_anime', leaving potential ambiguity about which to use.

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 provides no guidance on when to use this tool versus alternatives like 'get_anime' or 'get_anime_ranking'. It does not describe context, prerequisites, or exclusions.

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