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 that the tool is 'Browser-based', which implies client-side operation and potential privacy benefits. For a simple converter with no parameters, this is meaningful behavior context, though it doesn't detail output handling or limitations.

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, well-structured sentence. It front-loads the action (converting Japanese titles), lists the target languages, explains the purpose (overseas expansion), and notes the platform (browser-based) without any redundancy or unnecessary detail.

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?

Given no parameters, no output schema, and no annotations, the description provides the essential elements: what it converts, to which languages, for whom, and how it operates (browser). It could be more explicit about the output format, but for a simple utility with no configurable inputs, this is largely adequate.

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 input schema has zero parameters, so the baseline is 4. The description adds context about the tool's purpose, and although it doesn't describe parameter syntax (there are none), it implies the Japanese title is obtained from the browser context, which is sufficient.

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 uses a specific verb '変換' (convert) with a clear resource '日本語タイトル' (Japanese titles) and explicitly lists the five target languages: English, Chinese, Korean, Spanish, and Portuguese. This clearly distinguishes it from sibling tools that generate or edit titles rather than converting them into multiple languages.

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 a clear use case: '海外展開用' (for overseas expansion), which implicitly tells the agent when to use this tool. Since no sibling tool offers multilingual title conversion, there is no need for explicit alternatives, but it could be slightly more explicit about when not to use it.

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