This feature may simply not be available - if that's the case fine, but it seems to me like it should be do-able.
When editing a normal page, we sometimes link to documents and tick the 'show asset summary'. Resultant WYSIWYG code will look like this:
%asset_summary_<id-of-asset-you-are-linking-to>%
When the page is rendered this is extrapolated to include file type, file size, etc - whatever has been configured in Global Preferences > File Summary Format.
No problems.
Jump to an asset listing, I'm listing PDF Files, and tried to use asset_summary - no dice. Issue being the asset_summary keyword needs the asset id as part of the keyword itself, but I can only get the asset id of the current listed item via keyword.
Workaround is to simply recreate whatever dynamic code the global file summary format has, but I was hoping to have a solution whereby if I updated the global preferences then all asset summaries would update, not have to update each asset listing one-by-one so they all match.
Cheers