There is protection for the stuff in normal inventory so that you won't discard.
There is no protection for profession tools.
That makes the 'sell all' button not useful when you are selling tool for commission.
I cannot move the costly profession tool to bank (to protect it).
I cannot mail them because they are character bound.
I cannot protect them like other stuff under normal inventory (with the chain in the icon).
When I try to sell hundred tools to the lady, I need to click them one by one if there is any expensive tool that I don't want to lose in her shopping list.
For the toon that I don't have expensive tool to protect, right now, I can just 'sell all' in one shot.