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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description does not need to restate the safety profile. It adds useful context about what kinds of presets exist, but it does not disclose additional behavioral details such as filtering semantics or output size.

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 dense sentence with a colon-led enumeration. The main action and scope are front-loaded, and every clause adds useful information without waste.

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 one optional parameter, a rich enum schema, and an output schema present, the description is mostly complete for selecting and invoking the tool. It could slightly improve by explicitly noting when this tool should be used in a preset_apply workflow, but little critical information is missing.

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?

Even though schema coverage is 100%, the description enriches the 'kind' parameter by mapping each enum value to concrete examples like PBR materials, studio three-point, hero three-quarter, and draft render profiles. This is meaningful value beyond the schema's fairly terse parameter description.

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 ('List') and concrete resource ('curated one-call presets for preset_apply'), then enumerates the four preset kinds. This is specific and clearly distinguishes presets_list from sibling preset_apply and other list-like tools.

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 phrase 'for preset_apply' clearly signals the intended workflow: list available presets before applying one. It provides clear context, though it does not explicitly state when not to use this tool or name alternative tools beyond preset_apply.

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