Find products in the store by free text, vendor, or status. Returns identity and total inventory only, not per-variant detail; call get_product for that. Use this first when you do not already know a handle.

Read one product in full, including every variant with its SKU, price and stock level. Identify it by handle or by gid://shopify/Product/... id. Exactly one of the two.

Stock for a SKU broken down by location, with available, committed and on-hand counts. Use when the question is 'can we ship it' rather than 'do we sell it'.

Variants at or below a stock threshold, lowest first. Use for restock questions. Scans up to scan variants and filters locally, so raise scan for a large catalogue.