Get thanks coupon

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

No annotations are provided, so the description must disclose behavioral traits. It only says 'get' without any mention of side effects, return format, required permissions, or safety profile. This is a complete lack of behavioral transparency.

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 concise but under-specified. It essentially restates the title without adding value, making it too sparse to be useful. It is not an appropriately sized description; it is merely a label.

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 the simple one-parameter schema but no output schema or annotations, the description is insufficient. It does not explain the expected return value, input specifics, or potential errors, leaving the agent with too little information to invoke the tool correctly.

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 has one required parameter 'thanks_coupon_id' with no description and 0% schema coverage. The tool description does not explain what this ID represents or how it should be used, failing to add any meaning beyond the minimal schema.

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 'サンキュークーポン取得' clearly conveys the action 'get' and the resource 'thanks coupon', making the purpose understandable. However, it does not distinguish this tool from sibling tools like rms_get_coupon or rms_thanks_coupon_search, and lacks scope details such as fetching by ID.

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. It does not mention any context, exclusions, or scenarios where this tool is preferred, leaving the agent without decision support.

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