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

The description adds no behavioral details beyond what the name and annotations already imply. It does not mention whether the stop affects all orbit animations or a specific one, whether it is reversible, or what state changes occur. The idempotentHint annotation is not reinforced with any contextual explanation.

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 phrase with no filler or redundancy. It is front-loaded and easy to parse, perfectly sized for its simplicity.

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 parameterless tool, the description conveys the core action adequately, but it lacks context about the scope of the operation (e.g., whether it stops a specific animation or all animations) and any potential side effects. The annotations provide some safety cues, but the description leaves room for interpretation in ambiguous scenarios.

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 tool has zero parameters, so the description is not expected to explain parameter details. Baseline 4 applies because there is nothing for the description to add regarding input semantics.

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 action ('stop') and the target ('orbit animation'), making it specific and distinguishable from sibling tools like startOrbit, controlAnimation, and removeAnimation. It is direct and unambiguous, providing a precise verb+resource pairing.

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 guidance on when to use this tool instead of alternatives such as controlAnimation or removeAnimation. The description only states the action without any context, prerequisites, or exclusions, leaving the agent without decision-making support.

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