gen_uthana_get_character

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

No annotations are provided, so the description carries the behavioral burden. 'Fetch' and 'without downloading assets' convey a read-only, non-download operation, which is useful. However, it does not mention side effects, required permissions, credit consumption, or error behavior for a metadata fetch.

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 short, front-loaded with the core purpose, and includes a useful KB reference and invocation example without padding. 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 low-complexity, two-parameter tool with an output schema, so the description does not need to explain return values. Still, the lack of parameter semantics and explicit routing versus siblings leaves minor but real gaps; the KB reference partially compensates by pointing to the relevant documentation.

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 only says 'by ID' and gives an example using the placeholder 'character-id'; it does not explain where a valid character_id comes from, its expected format, or the meaning of timeout_s. The timeout parameter is left entirely undocumented in the description.

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 states a specific action ('Fetch'), a specific resource ('Uthana character metadata'), and an identifier mechanism ('by ID'). It also adds a distinguishing boundary: 'without downloading assets', which separates it from asset-returning siblings in the same family.

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 implies the tool is for metadata-only needs and explicitly says it does not download assets, but it does not name alternative tools or give when-to-use/when-not-to-use conditions. The KB pointer adds context, but the description itself leaves tool selection mostly to inference.

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