I didn't realize that the Blue Tool discussion never made it over here to the Fleet-
After searching around for more instances of the snap utility knife tool I started looking for more of Picard's desk tools. One that seems to show up often is what I call the "Blue Tool".
I think it matches up to a prop I found in this auction-
The Description- "A Medical Auto-injector used in Star Trek: The Next Generation. This is a Starfleet medical device used in the production of the show as set dressing for the Med-Bay aboard the Enterprise-D. This item was made from a commercially available laboratory pipette, and has production applied vinyl line details. This piece is accompanied by a small vacationer tube, that also has applied metallic graphics. These items remain in good condition and measures 7" in length. From the collection of Joe Longo."
Here's a composite of a bunch of the shots it appears in-
I love Picard office supplies. :)/>/>