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

Annotations already establish read-only, idempotent, non-destructive, and closed-world behavior, so the bar is lower. The description still adds real context beyond them: typo-suggestion behavior in matching, paginated public links, and the absence of an OAuth requirement, which materially affects how an agent invokes it.

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?

Four short, front-loaded sentences with the core action first and behavioral qualifiers after. Mostly waste-free, though the trailing "Read-only" sentence largely restates the readOnlyHint annotation already supplied.

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?

With an output schema present, return values need no explanation, and the description covers the essentials an agent needs: public/unauthenticated access, pagination, and fuzzy matching. It omits the pagination mechanism (page vs. cursor), but that is fully specified in the schema, so the gap is small.

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%, so the schema already documents q, page, cursor, and per_page in detail, including cursor expiry and page/cursor mutual exclusion. The description only glances at q semantics via "typo suggestions" and adds no format or syntax detail beyond the schema, fitting the baseline 3.

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 verb and resource ("Find brands through the storefront brand search") and clarifies the scope is public brand links, which distinguishes it from search_products. It stops short of naming the sibling tool explicitly, so an agent must infer the boundary from the resource noun alone.

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?

Implies two usage modes (search vs. browse when q is omitted) and states no authentication is needed, which is useful context. However, it never states when to prefer this over search_products or any other sibling, and carries no exclusions; the load-bearing usage guidance lives in the q parameter description rather than here.

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