Ever since the new Vue.js search experience was deployed to French Wiktionary (T249297), it was supposed to disable descriptions:
'wgVectorWvuiSearchOptions' => [ 'default' => [ 'showThumbnail' => true, 'showDescription' => true, ], '+frwiktionary' => [ 'showDescription' => false, ],
However, as @Michael and I found out, specifying false in a +overriding block actually has no effect: it’s treated the same as if the key had not been specified, and the default value remains in effect.
lucaswerkmeister-wmde@mwdebug2002:~$ mwscript shell.php frwiktionary Psy Shell v0.11.8 (PHP 7.4.33 — cli) by Justin Hileman >>> $wgVectorWvuiSearchOptions => [ "showThumbnail" => true, "showDescription" => true, ]
The only reason that most frwiktionary search results don’t show a description is simply that the pages have no description, neither local (why would they?) nor central (the Wiktionary main namespace is not connected to Wikidata items):
However, pages that have a description still show it in the search:
