Magic items might be identified if DN states such behavior exists when near it, holding it, wielding, etc. including cursed items.
Magic items do not automatically reveal their properties. A character understands an item's exact function only after examining, testing, or attempting to use it under the DN's guidance. A short period of handling - a few moments or minutes - is usually enough for basic items such as simple weapons, armor, potions, or charms.
More complex items, items with multiple effects, or items tied to a specific tradition may require a longer inspection or relevant lore.
Cursed items can conceal their true nature and may appear entirely normal until used. The DN decides how much information an item reveals during examination and whether additional time, knowledge, or experimentation is needed.