Description
As mentioned by @SJu-w in #4137
Files uploaded to Commons by the app have a name of the photographed subject just in the filename, but not in the file description ("description" field of the "Information" template). The description field contains just the label of the value of the P31 (instance of) property, which is usually a vague general term.
Example:
See https://commons.wikimedia.org/w/index.php?title=File:Souso%C5%A1%C3%AD_svat%C3%BDch_j%C3%A1hn%C5%AF_Ji%C5%99%C3%ADho_a_Agapita_u_cesty_ke_kostelu_sv._Petra_a_Pavla_v_Mimoni.jpg&oldid=521598789 file title and original file description. The description should be {{cs|1=Sousoší svatých jáhnů Jiřího a Agapita u cesty ke kostelu sv. Petra a Pavla v Mimoni}} but it is {{cs|1=socha}} (= statue) instead.
Solution:
Edit the template which generates the description of photos saved to Commons by the application: "description" field of the "Information" template should be filled with the label of the photographed subject, not with the label of the value of its P31 (instance of) property
Task: If the Wikidata item has a description in the user's language → Pre-fill the picture's description using the Wikidata item's label+description. (example: sculpture of the Holy Deacons of George and Agapit on the way to the Church of St. Peter and Paul in Mimoň (baroque statue in Mimoň, Czech Republic))