I actually have descriptions for all the spells in the SRD and some
nonSRD suplements that I won't mention. They're unfortunately not the
SRD blurb text, or I'd approach WotC mysef for permission to distribute
them. So no, you can't have them.
However, they demonstrate that you can indeed MOD the DESC tag. I load
the PHB, and if I have a spellcaster I load the MODfile, and moilla, I
get nice little packet descriptions reminding me what the spell does.
I've done the same for the FEATS from the SRD, and I'm giving the
wonderous items in the SRD the same treatment.
Let the sun never blind your eyes
Let me sleep so my teeth won't grind -- "Grind",
Hear a sound from a voice inside Alice in Chains