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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the read-only, non-destructive behavior is established. The description adds no extra context beyond 'list' (which is consistent with the annotations) and does not describe output structure or any side effects, but no contradiction exists.

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 sentence with no filler. It gets straight to the point, though it could be marginally more informative (e.g., 'wavy hair templates') without sacrificing brevity.

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?

Given the tool's simplicity (0 parameters, output schema present, annotations provided), the description is minimally adequate. However, it lacks any contextual link to the related virtual try-on tool and does not explain the purpose of these templates or how they fit into the broader workflow.

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 and the input schema is empty with 100% coverage. The description does not need to explain parameters, and the baseline for 0-parameter tools is 4.

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 uses the verb 'List' and object 'predefined templates', which clearly indicates the action, but it is generic and does not specify 'wavy hair' or 'virtual try-on'. The name and title provide that context, yet the description itself does not differentiate from other template-listing sibling 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?

No guidance is given about when to use this tool vs. alternatives. It does not mention that these templates are meant for the AI-Wavy-Hair-Virtual-Try-On tool or how to use the returned template identifiers with it.

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