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

With no annotations, the description carries the full burden. It usefully discloses that results are live data, that it works across any Vinted market, and the per-record credit cost. It says nothing about pagination behavior (start_page), rate limits, or authentication needs, so a meaningful portion of the behavioral profile is undisclosed.

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?

Two tight sentences, zero filler, with the resource and facet list front-loaded and the cost note kept short at the end. Every clause earns its place.

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 14-parameter, no-annotation, no-output-schema tool the description covers what it searches and what it costs, but omits pagination semantics, how max_items interacts with the per-record pricing, and any indication of the response shape. Functional but not fully sufficient.

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% across 14 parameters, so the schema already documents each field, including enum values for order and domain. The description does little more than group the ID-style filters conceptually and adds no format, ID-lookup, or currency-interaction guidance beyond the schema. 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?

Names a specific verb (Search) and resource (live Vinted items) and enumerates the filterable facets (category, brand, size, condition, color, material, price). It is clearly the keyword-search entry point for this marketplace, though it never references the sibling run_vinted_users_items to draw a boundary between global search and user-scoped item listings.

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: 'Search live Vinted items by keyword' suggests when it fits, and '1 point per returned record' hints that result size has a cost, but there is no stated when-not-to-use and no pointer to alternatives such as run_vinted_users_items or the other marketplace search tools. Adequate but leaves routing to inference.

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