The bags in these photos are quite a bit bigger than the ones in the first photos. And, I agree with you that they are lovely evening bags appropriate for when a person is rarely carrying daily stuff.To me, "minaudière" describes jewelry-type bag.
Pure decorative whimsy.
To accent outfit.
Not necessarily to do. But to be--preferably be beautiful.
I shun these bags for myself.
Because I spill things.
And wear jewelry/carry useful clutch instead.
However, for look, think hand-held works better than crossbody-style strap (op photo).
Because does not interfere with clothing lines. And seems more mature.
http://s.plurielles.fr/mmdia/i/73/7/toutes-addict-a-la-minaudiere-10660737yocnj_2041.jpg
Adds final spark. As exclamation point at end of outfit's sentence.
Hope helps.
But the micro bags are quite a bit smaller yet seem to be for day / regular use. For me they are highly impractical. But, others with different needs may love them.