Using adjectives to describe famous personalities is followed everywhere. You cannot just speak generic things about the honorable guests you have invited for the function. A summary of their profession, strengths, contribution etc. should be known to the person who is going to hold the microphone and welcome them.
Proper adjectives should be used and related to the concerned personality. Exaggeration should be avoided. If you glorify someone with more appreciation, the person may like however the crowd may not agree /accept the words wholeheartedly.