Answer:
I can be entertaining until you realize some pieces have been lost.
First I may be your servant's name; then your desires I may proclaim; And when your mortal life is over hold all your wealth within my power.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
you hold my tail while I fish for you
What gets sharper the more you use it?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?