it's in our roadmap ;)
we plan to allow users to add related images of their tools.
Image file won't be stored on edcodex (maybe later)
but I will add a way to allow add external image links (imgur & co)
On my side I prefer not allowing images inside description text
but in a specific field like the field links for thread / sources / ...
(be better to have a similar structure for every tool).
I'm open to debate about that solution if you have an other idea :)
Try to implement that asap (maybe later today).