sine

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

No annotations are provided, so the description carries the behavioral disclosure burden. It adds useful details: input must be degrees rather than radians, output is bounded between -1 and 1, and the operation is logged. It also notes that the result may be an error message, giving an agent awareness of failure modes.

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 well-organized with Args, Returns, and Notes sections. It is concise, front-loaded with the core purpose, and every line contributes useful information without redundancy.

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 math tool with an output schema available, the description covers input semantics, unit expectations, output behavior, and logging side effects. Nothing essential is missing for an agent to select and invoke this 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?

Schema description coverage is reported as 0%, so the description must compensate. It states that 'data' is an AngleOperation object containing the angle in degrees, which clarifies the single parameter's purpose and units. However, it mostly restates what the schema shows and does not add detail about accepted ranges, rounding, or edge cases.

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 opens with a specific verb and resource: 'Calculate the sine of an angle in degrees.' It clearly identifies the mathematical operation, the input unit, and is immediately distinguishable from sibling tools like cosine, tangent, and logarithm. The scope is unambiguous.

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 clear context for when the tool is appropriate: whenever the sine of an angle in degrees is needed. It does not explicitly state exclusions or direct the agent to an alternative sibling, but for a well-defined math operation the intended use is clear.

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