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

Annotations already indicate this is not read-only (readOnlyHint=false), but the description adds no context about what happens on creation, validation, authentication needs, or side effects. It only restates the high-level purpose, so it does not disclose behavioral traits beyond the 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?

The description is a single short sentence with no wasted words, but it is under-specified. It is concise in length but lacks necessary details, making it borderline appropriate.

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 create operation with 3 parameters and no output schema, this description is inadequate. It does not explain what is required, how to provide HTML content, what response to expect, or any constraints. The description does not provide enough context for an agent to use the tool effectively.

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?

Schema description coverage is 0%, and the description does not explain any parameter meanings. It does not mention that html_content is required or what parameters like name and description are used for. The description fails to compensate for the lack of schema descriptions.

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 'Design a new document layout' uses a clear verb ('Design') and resource ('document layout'), which is interpretable as creating a template. It distinguishes from sibling tools like list_templates, preview_template, and fill_template because it implies creation. However, 'document layout' is slightly less specific than 'template', and it could be more explicit.

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 provides no guidance on when to use this tool versus alternatives. It does not mention preconditions, alternatives, or exclusions. With siblings like fill_template and preview_template, the lack of differentiation makes it unclear when create_template is the right choice.

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