Huh? A worship leader is not a professing Christian who is musically talented and has the ability or desire to lead from the front of a church in an attempt to inspire people to feel something towards God through music etc.(although on the surface that sounds OK doesn't it)
A worship leader is a professing Christian who has a deep understanding of, and passion for, the truth of scripture, and why in the context of all scripture, the church practices congregational worship. Moreover, with that understanding their foundation, they also possess the necessary skill to lead a congregation musically, and have a desire to help lead the church in the practice worshipping God together.
A person desiring to be worship leader must develop the knowledge with the musical gift.