Feature summary (what you would like to be able to do and where):

When admin B takes action to undelete a file (on Commons) which admin A has deleted, admin A should receive an alert, similar to a revert of an edit on Wikipedia. Perhaps a similar case is undeletion of Wikipedia pages, Wikidata items etc. It appears undeletion can now be done unnoticed by admin A.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

I accidently noted another admin on Commons did undelete a file I had deleted, and would have liked to be notified automatically. In this case somebody else notified me, but imho this should have been done automatically. The mentioned admin B did not comment on my talk page, nor did they initiate a procedural request for undeletion, possibly forgot to do this, or was not aware this would be de procedure.

For information, my motivation for creating this task is to be seen here: https://commons.wikimedia.org/wiki/Commons:Deletion_requests/File:1927_-_Lord_Mayor_Hugh_Lupton_(in_Mayoral_chains)_at_a_luncheon_in_Leeds_with_Lord_Harewood_(left).jpg

Benefits (why should this be implemented?):

In that case we could have a discussion why the file should be kept or should be deleted. In the current situation it is impossible to check if somebody reverted your decision and why they did so.