How to set tooltip on k2 view title

Hello  @ProInception 

Here is how to use a rule to update the tooltip of the Title Text Box at runtime:
https://help.k2.com/onlinehelp/K2Five/UserGuide/5.3/default.htm#Create/K2Designer/Controls/AddControl.htm

If you are in dev you might just have a glance at this syntax:

https://help.k2.com/onlinehelp/K2Five/DevRef/5.3/default.htm#../Subsystems/DTAA/Content/topic10848.html#seealsobookmark

Last but definitely not least you might just like to have a glance at tooltip over picker
https://community.k2.com/t5/K2-Cloud/Tooltip-over-Picker/td-p/108346