After the user selects the pictures, they can view the list of images they have selected along with their title, description and option to unselect.
But if a normal user uses this tool, it is difficult for them to find out that they can edit the title and add the description and this might be a disadvantage for the user and the feature is not being utilised by the user.

Also as mentioned already,
More metadata fields can be added to the image. The important metadata for a image might be:
Date image is created
Categories
Captions
License
Image type
Width and height of the image
Hashtags for the image etc.