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

With no annotations provided, the description carries the full behavioral disclosure burden. It clearly states the tool returns pinyin, tone, classical sources, and a link to the full page on sealscrafter.com, which gives the agent a good picture of the output. It does not mention any side effects or failure modes, but for a read-only lookup this is largely sufficient.

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 two sentences and about 35 words, with the core action and scope front-loaded. Every clause adds value: meaning/etymology, pinyin/tone/classical sources, and the link to the full page. No filler.

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 one-parameter lookup with no output schema, the description explains what will be returned (meaning, etymology, pinyin, tone, classical sources, link) and the scope (characters in Chinese names). It does not describe the exact output format or any edge cases (e.g. non-Chinese input), but the description is sufficiently complete for correct invocation.

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 100% and the parameter is already described as 'One Chinese character, e.g. "雨"'. The description adds the contextual note 'used in Chinese names' and examples, but it does not meaningfully expand on the parameter's format or constraints beyond what the schema already provides. Baseline 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?

The description states a specific verb ('look up') and resource ('meaning and etymology of a single Chinese character'), with a clear scope ('used in Chinese names') and even examples ('雨', '李'). This clearly distinguishes it from sibling tools like render_chinese_name_seal and suggest_names, which serve different purposes.

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 when to use the tool—when you need the meaning, etymology, pinyin, tone, or classical sources of a character in a name—but it does not explicitly contrast it with alternatives or state when not to use it. No exclusions or alternative routing is provided.

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