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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, covering the safety profile. The description adds that it includes both built-in looks and saved themes, which is useful context, but does not disclose additional behaviors like pagination or ordering. This is adequate given the annotations, but not overly rich.

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, front-loaded sentence that directly states the action and scope. No redundant words or filler, making it highly concise and well-structured.

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 simple list operation, the description, combined with comprehensive annotations and a full output schema, provides complete context. There are no missing details about return values or safety, and the tool's simplicity means no additional context is needed.

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?

All three parameters have full descriptions in the input schema, achieving 100% schema coverage. The description itself does not add parameter-level meaning, but the schema is sufficient, so the baseline score of 3 is appropriate.

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 lists built-in caption looks and saved caption themes for a workspace, using a specific verb and resource. It distinguishes itself from sibling tools by focusing on caption themes, which is unique among the provided 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 description implies usage as a simple listing tool, but provides no explicit guidance on when to use it versus alternatives or when not to use it. Since no alternative theme-listing tools exist among siblings, this is acceptable but not explicitly stated.

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