add_many_to_cart

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

No annotations exist, so the description carries the full burden. It does disclose one genuinely valuable trait — that processing continues when a line fails — which tells the agent to expect partial success rather than atomicity. It says nothing about authentication, cart-state preconditions, whether successful lines persist after a failure, or any rate limits, leaving substantial behavioral ground uncovered for a mutation tool.

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 three telegraphic fragments are front-loaded and free of filler, and the item shape is surfaced immediately after the purpose. The trade-off is under-specification rather than verbosity, and the mojibake in "groupé" slightly harms readability. Nothing wasteful, but equally nothing polished.

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 documentation is legitimately omitted and the partial-failure note covers the main edge case. Still, for an unannotated batch mutation with a completely undescribed input schema, the description should specify required item fields and whether failed lines leave the cart partially modified.

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 0% and the schema itself only declares `items` as a loosely typed array of free-form objects, so the description is the sole source of item structure. It supplies the exact field set {product_id, offer_id, seller_id, quantity}, which is real added value, but omits which fields are required versus optional, their types, and acceptable quantity ranges.

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 phrase "Ajout groupé" plus the tool name make it clear this is a batch add-to-cart operation, and the item shape confirms the resource. However, it never explicitly contrasts itself with the singular sibling add_to_cart, so an agent must infer the distinction from the name alone. Purpose is understandable but only minimally differentiating.

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?

There is no statement of when to prefer this over add_to_cart, update_cart_line, or any other cart sibling, and no prerequisites or preconditions are given. The only usage-adjacent information is the partial-failure clause "Continue si une ligne échoue," which describes runtime behavior rather than selection guidance.

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