Lupa Shop

Each tool targets a distinct intent: single-product price search (buscar_preco), whole-list comparison (comparar_lista), historical price lookup (historico_preco), and deal browsing (ofertas_do_dia). Descriptions include explicit 'use for' trigger phrases, so an agent can route cleanly even between the two price-finding tools (one item vs up to 10 items).

All names are lowercase snake_case in Portuguese, which is internally consistent and readable. However two use a verb_noun form (buscar_preco, comparar_lista) while the others use noun phrases (historico_preco, ofertas_do_dia), a minor stylistic split rather than a real problem.

Four tools is lean but each covers a genuinely different workflow (single item, list, history, discovery), so nothing feels redundant. It is at the low end for a price-comparison domain where product detail or store filters could also exist, but it is well-scoped for the stated purpose.

The core lifecycle — find lowest price for one item, for a basket, check whether today's price is historically good, and discover current discounts — is fully covered. Gaps are minor: no price-drop alerts/watchlist, no product or store detail lookup, and no shipping (frete) calculation despite the list tool mentioning totals exclude it.