The real question is, does the sandal have a back? That is, does it have a strap around the ankle that will hold it on your foot. The toe protection is no help if the shoe can slip off your foot in two seconds.

I base this on our footwear rules for the arts and crafts room at camp. To work with wood or stained glass, your shoes had to have a closed toe. Anywhere else in the art room required at least a sandal with a strap - that is, no clogs or flip flops. This was based on the assumption that paintbrushes, sewing needles, etc, were not going to do too much damage if they fell on your toes, but all bets were off if your shoes fell off your feet - after all, the floor was inevitably adorned with everything from thumbtacks to glass shards.