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

With no annotations, the description carries the full burden and does meaningful work: it discloses the output form (deep-links, optional catalog matches) and an important quirk (links omit ?tag= while tagConfigured=false). It stops short of stating side-effect-free/read-only behavior or failure modes, which keeps it from a 5.

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 sentences, front-loaded with purpose then return shape then constraints; no filler. Minor redundancy in repeating 'REQUIRED' that the schema already enforces.

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?

Eight parameters, no output schema, so the description must characterize the response — and it does (deep-links plus optional catalog matches, tagConfigured=false). The missing piece is guidance on how the room/budget/dorm-rule filters influence results, which matters given no output schema to inspect.

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 100%, so the schema already documents q, limit, locale, marketplace, roomType, dormRules and budgetBand with examples and enums. The description only restates the requiredness of marketplace and locale, adding no semantics for the filter parameters. Baseline 3 applies.

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 ('Search dorm / back-to-school essentials') and immediately discloses the return shape (Amazon search deep-links, optional catalog matches). It is clearly distinguishable from create_kit/add_kit_item, though it never names the closest sibling (resolve_product) to route between item-level search vs. product resolution.

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?

Usage is only implied by the domain framing; there is no explicit when-to-use statement or when-not comparison against resolve_product or the kit-creation siblings. The only guidance given is a parameter constraint (marketplace + locale REQUIRED), which is not the same as invocation guidance.

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