I don't think it has any effect on me using the tool but I would say that Alcatraz has negative connotations for me.

There are Ruby "Gems" and Cocoa "Pods", I'm trying to think of a similar name that evokes something that can be slotted in to something else... Cubby?

Cubby - any of a group of small boxlike enclosures or compartments, open at the front, in which children can keep their belongings, as at a nursery school.