Could you please let us know which version of Photoshop are you using?
I'm able to hover my cursor and see names appear for every tool & brushes.
Sorry Sahil, I should have given you some information in my first post.
CC 19 with update. Dell XPS 15 (9550) with 32Gb ram. Logitech MX Master mouse. Windows 10 Pro 64bit. Latest Nvidia driver.
You can see the absence of the yellow name text here:
You can see the hand with no text above it.
Have you got "Show Tooltips" checked in Preferences >Tools ?
I am the one who threw the baby out with the bath water: I wanted to stop the colour image tool tips that flew out of tools in the toolbar but deselected "Show Tooltips" as well as "Use Rich Tool tips". Completely my mistake.
Thanks for your help.
Easily done, you're welcome