quaternion_slerp_interpolator

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

With no annotations, the description carries the behavioral disclosure burden. It adds useful context such as gimbal-lock avoidance, unit quaternion requirement, and the 0.020 USDC payment expectation, but it does not describe return values, error handling, normalization assumptions, or output format.

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 front-loaded sentence with no filler. It packs the operation, the mathematical domain, and the payment cost efficiently.

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?

The generic 'payload' string parameter and lack of an output schema leave significant gaps. An agent still does not know what exact JSON fields to provide, what the response shape is, or how to format quaternion/Euler/matrix inputs, so the description is not fully actionable.

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%, so the baseline is 3. The description adds domain-level meaning by indicating payload content will involve quaternions, Euler angles, and rotation matrices, but it does not document the actual JSON structure or required fields for the generic 'payload' string.

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 a specific verb and resource: Gimbal-lock-free SLERP interpolation and rotation transforms among unit quaternions, Euler angles, and 3x3 rotation matrices. This precisely identifies what the tool does and distinguishes it from the many mesh/geometry siblings.

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 intended use case is implied by the description: use for quaternion SLERP or conversion between rotation representations. However, there is no explicit when-to-use guidance, no mention of alternatives, and no exclusions, so an agent must infer the appropriate context from the tool name and description alone.

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