Thanks a lot Richard !
Tested and approved, Works like a charm !
Just a little more request, it could be perfect if in the case that we have set "Enable META settings for MULTI page Joomla items:" to YES, that if the others pages have not already descriptions to have the first description by default ?
In my case I got a lot of articles and so I can't rewrite all the descriptions so quickly lol.
Because actually for others pages of an article with the multi option set to on, we just got: <meta name="description" content="Array" />
<meta name="keywords" content="Array" />
Cause lacks of the text.
Thanks again Richard