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

Annotations already declare readOnlyHint and openWorldHint, and the description adds real behavioral value beyond them: it states there is no pagination of its own and that an unrecognized id returns a not-found error. These are useful operational traits an agent needs to handle results and errors correctly.

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?

Purpose and the sibling distinction are front-loaded, and every clause carries information (examples, id formats, error behavior). It is somewhat dense and run-on, but nothing is wasted.

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?

An output schema exists so return values needn't be explained, yet the description still sketches the response shape (title, breadcrumb, shelves, tile grid), plus id formats, error handling, and sibling relationships. Nothing an agent needs to call it correctly 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?

Schema description coverage is 0%, so the description must carry the load, and it does: the id accepts either a bare numeric content page id or a full /cp/{slug}/{id} URL, with only the trailing id used. This fully specifies the sole parameter's accepted formats.

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 names a specific resource (a Sam's Club curated content/landing page) with concrete examples and explicitly distinguishes it from samsclub_category's flat product grid. An agent can tell exactly what data this returns without opening the schema.

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?

It clearly explains the routing context: this is for curated content pages, and samsclub_departments entries with type "cp" supply the ids that pair with this tool. It stops short of an explicit 'use samsclub_category instead when X' sentence, but the differentiation makes the choice clear.

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