add

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It describes a pure computation (adding integers), which implies no side effects. The simplicity of the operation makes this adequate, though it does not explicitly state that it returns the sum (but output schema presumably covers return type).

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, concise sentence that front-loads the essential purpose. There is no extraneous information; every word 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?

Given the tool's simplicity (adding two integers), the description is complete enough. The existence of an output schema likely covers return value details. The description does not discuss error handling or edge cases, but this is reasonable for such a straightforward operation.

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 0% description coverage, and the description does not elaborate on parameters individually. However, it adds meaning by specifying that the tool operates on integers, which reinforces the schema's type information. This is minimal but acceptable for a simple tool.

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 verb ('足し算する' meaning 'add') and the resource ('2つの整数' meaning 'two integers'), making the purpose unambiguous. Despite not explicitly distinguishing from the sibling tool 'say_hello', the descriptions are sufficiently different that no confusion arises.

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 does not provide explicit guidance on when to use this tool versus alternatives, but the usage is implied: use it when you need to add two integers. No exclusions or sibling comparisons are mentioned.

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