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

No annotations are provided, so the description carries the full behavioral burden. It says the tool produces a CSS linear() easing function and a suggested duration, which is useful output context, but it does not disclose defaults, valid ranges, units, or what happens when parameters are omitted (the schema marks none as required).

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?

A single, front-loaded sentence with a bracketed category tag followed by the core action; no filler or repetition. It is efficient, though the bracket tag adds little beyond classification.

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?

With no annotations, no output schema, and 0% parameter coverage, the description should do more: it omits default behavior for the unrequired parameters, valid input ranges, and the shape of the returned CSS/duration value. What is present is accurate but insufficient for correct invocation.

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 0%, so the description must compensate for all three parameters. It names them (stiffness, damping, mass) and frames them as spring physics values, but adds no units, ranges, defaults, or interaction semantics beyond what the bare schema property names already convey.

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 states a specific verb and resource: it simulates spring physics parameters (stiffness, damping, mass) and converts them into a CSS linear() easing function plus a suggested duration. This is far more precise than a tautology and an agent can tell what it produces. It does not, however, differentiate itself from the sibling motion__generate_easing, which plausibly overlaps in purpose.

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?

There is no statement of when to use this tool versus alternatives such as motion__generate_easing or motion__generate_keyframes, and no prerequisites or exclusions. The intended context (spring-based motion design) is only implied by the parameter names.

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