Create Custom Style

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

Annotations show readOnlyHint=false (write operation) and openWorldHint=true. The description adds that it returns a style_id, but does not disclose side effects, authentication needs, or failure modes. It adds minimal behavioral context beyond annotations.

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?

Three concise sentences, each adding value. Front-loaded with the core action, then explains usage and returned value. No redundancy or filler.

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 description covers creation, input constraints (1-5 images), and use of the returned style_id. No output schema exists, but the description adequately explains the outcome. Could mention error conditions or required permissions, but overall sufficient.

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 input schema has 100% description coverage, explaining both parameters (images, style). The description restates '1-5 reference images' and mentions the returned style_id, but adds no new parameter details beyond the schema.

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 tool creates a custom style from 1-5 reference images and returns a style_id for later use. It distinguishes itself from sibling tools like generate_image or list_styles by focusing on style creation.

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 description implies usage in a workflow (create then use style in generation), but does not explicitly state when to use this tool versus alternatives like list_styles or delete_style. No exclusions or when-not-to-use guidance is provided.

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