Tradeskill Workshop?

[Aldier]

Make another lead to a Guild "Tradeskill Hall."

The different Bankers there could then hold all the tools (various hammers, various combine containers, various needles and so forth an so on)... so long as they aren't No Trade items.

Guild Tradeskillers can then pull them out for use and put them back afterwards (tool sharing).

And there would be three merchants (one in place of Tribute person) that sell the TS supplies.

Problem would arise, however, with folks not putting tools back, I suppose.

Couple comments
1) you already have all the static tradeskill containers in the guild hall. Why do you need a separate zone to hold them?
2) The guild hall is an instanced, you now want to make an instanced zone off of an instanced zone? The instanced servers close down zones if no one is in them. This is why the guild hall takes time to load up if no one is in it and is also why the merchant in the guild hall resets and loses any items sold to them when the guild hall closes.
3) The bankers and the tools, I do not think there are any way for bankers to hold ONLY certain items. Also, if your guild wishes to share tradeskilling tools, use the GUILD BANK. You just will need to have the banker flagged toons come through and make sure the tools are moved from the deposit area to the main bank list and marked as public.
4) There are WAY too many tradeskill items on WAY too many vendors to put them ALL in a small zone on 3 or 4 NPCs. If you have ever been a part of a Beta, there are a good dozen or more tradeskill vendors specifically set out to help testers and it is not something that you would want confined to a small space like the guild hall.