Добавить в корзину Megamarket

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

No annotations are provided, so the description must carry the burden. It discloses the side effect (add to cart) and the return value (current cart state), but it does not mention authentication requirements, duplicate-item behavior, or error conditions, leaving some behavioral gaps.

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?

The description is a single sentence that starts with the action, specifies the id source in parentheses, and states the return value. Every phrase is meaningful; there is no filler.

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 one-parameter tool with an output schema and clear sibling context, the description is sufficiently complete: it states the action, the id source, and the returned cart state. It lacks minor behavioral details like duplicate handling, but the tool's simplicity and existing output schema mitigate the impact.

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?

The single parameter 'id' is fully described in the schema as from search_products or get_product, and the tool description mirrors this by saying 'по id из выдачи/деталки'. Since schema coverage is 100%, the description adds no new parameter semantics beyond the schema, so baseline 3 is appropriate.

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 uses the specific verb 'Добавляет' with the resource 'корзину' and specifies that it works by product id from search or detail pages, clearly distinguishing it from sibling tools like view_cart and checkout. The scope is immediately understandable.

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?

The description implies use after obtaining an id via search_products/get_product, which gives a clear workflow context. However, it does not explicitly state alternatives or exclusions (e.g., when not to use), so it falls just short of full guidance.

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