Ok, tebrey, the reason there's no EVA event is because it's not an upgrade.
Just like when you use Jarmen Kell's pilot killing sniper rifle
compared to
One of them just switches weapon slots, while the other one calls an upgrade. The upgrade itself is what does the EVA event. And if you don't give a label to the upgrade or give it a value of NONE it will say "Missing:"
If you don't declare a sound, it just uses the Default EVA "upgrade completed" sound. And even if you could disable the sound and the label, the minimap event is still there.