The definition found in the Wiki is already pretty good in that regard.
Rewards and difficulty should not be the deciding factors to determine if it's a JP or not.
Also, a plattform challenge isn't necessary a jumping puzzle according to that definition.
Nontheless should they be part of the list in my opinion, since most players regard them as JP's anyway.
You are right but the name shouldn't be the deciding factor, since "Armistice Bastion" is also listed.
So naming it "Hall of Memories" should do the job just fine for now.
I was just surprised in general that i couldn't find a complete list which mentions every JP + Plattform challenge.
I would've expected it, since there are tons of JP fans out there.