Depends on what you want to use it for I think. If you are going to use it for crafty projects, I think lining it would be best, since otherwise you will be losing needles etc. out the spaces. If you are going to use it for shopping, you are probably ok with it as is.
WIP Elegant Irises by Amanda Butler Lazy Days by Mystic Stitch pg 1/24 (BAP) Nativity Story Table Topper pg 1/6 by Blackberry Lane Designs (BAP) Amazing Grace by MBT (BAP) pg 1/6 Baby Ark Sampler by Bothy Threads pg 1/4 Skate by AAN Herbes et Epices by Madame La Fee Ornaments 1/12
Completed 2020 Names of God by MBT Ponchos x3 (2 nieces, 1 doll version!) Christmas ornaments - 11/11 Soffia by AAN
The colours in the bag are lovely; it looks great. But rather like everybody else, I would line it too. I hope that you're really pleased with how it has come out? Do show us another pic when lined; what fabric will you use?