Responses
I'm not sure but you can try to report the summary and see what the admin thinks about it..
So go to a manga page one which you want to write the summary, then click the white flag on the left of the page and choose 'Other' then explain what you wanna do or try to write the summary, they will contaci you with a notification and answer your questions..
Just curious, but is there an authority required to write summaries for manga? (such as the people who upload) If so that'd be a shame. Cause I wouldn't mind doing so for manga's missing summaries. Σ(  ̄□ ̄||)