The trinkets line referred primarily to

In the event that Mr. Longbottom's guardian was so negligent as to keep him in Hogwarts, Mr. Potter wanted him to have a Time-Turner, an invisibility cloak, a broomstick, and a pouch in which to carry them; also a toe-ring with an emergency portkey to a safe location, in case someone kidnaps Mr. Longbottom and takes him outside Hogwarts's wards. I told Mr. Potter that I did not think the Ministry would consent to such use of our Time-Turners, and he said that we should not ask. I expect he will want Miss Granger to receive the same, if she stays. And for himself Mr. Potter wants a three-person broomstick to carry in his pouch." She wasn't awed by the list of precautions. Impressed with the cleverness, but not awed; she was a Transfiguration Mistress, after all. But it still sent shivers of disquiet through her, that Harry Potter now thought Hogwarts as dangerous as spell research.

as well as the fact that she unlocked his Time-Turner basically for the asking.

At the time she locked it this was not the case, granted. But at the time she locked it Harry was abusing it wildly, and there was no obvious danger. Stopping him was the main priority, and the shell did that quite effectively.