Some kinds of abuse (cf T129845) use file formats with flexible metadata fields to camouflage illegal uploads; the payload is hidden in e.g. the EXIF description field of a JPEG file. There is little reason for legitimate metadata to be larger than a few kilobytes; if the total metadata size was made available to anti-abuse tools, that would make the filtering of such uploads much easier.
|Open||None||T170251 Create AbuseFilter variable for file metadata size|
|Open||Cparle||T175599 File metadata size extraction scoping|