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

Annotations already declare readOnlyHint and openWorldHint, so safety is covered; the description adds genuinely useful behavior beyond that: no pagination of its own, acceptance of bare id or full /cp/{slug}/{id} URL, and that unrecognized ids return a not-found error.

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?

Front-loaded with the primary resource description, then id semantics, then sibling linkage, then the error case. Dense but every clause carries distinct information; only the URL-parsing sentence is slightly over-detailed for its weight.

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-value detail is not required. Given a single-parameter read tool, the description covers resource scope, id format, sibling linkage, and the failure mode — nearly complete, with only pagination-free return size left implicit.

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 coverage is 100% (baseline 3), and the description adds meaning beyond the schema: it clarifies the id may be a bare numeric id or a full URL, and that only the trailing id of a URL is used. That resolves ambiguity about 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?

States a specific resource (a single curated content/landing page) and enumerates its distinct contents (title, breadcrumb, shelves, tile grid). It explicitly contrasts with sibling samsclub_category's flat paginated product grid, so an agent can route between the two without opening schemas.

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?

Explains the context for use (curated hubs, New Arrivals pages) and names the sibling samsclub_departments with type "cp" as the pairing source for ids. It does not state an explicit exclusion ('use X instead when...'), but the category contrast gives clear selection context.

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