Homebrew restrictions?

Enjoying using Homebrew. Great for unique items for our campaign. 

Question: is there a way as DM to restrict campaign members from looking at what is in my homebrew?  I want to be able to assign things to their characters when they find/enounter th em, but not let them see items that they have not encountered yet in the campaign.

If you've created it, you can click Remove From Collection and it'll be unavailable for browsing/selection on sheets. You'll still have it under the link My Homebrew Creations and can add it when appropriate by clicking the button again (which will now say Add To Collection).

If it's someone else's published homebrew, bookmark the page before removing from your collection. That way you still have an easy way to return to it.