Have you made any useful utilities with Odin?
Login and submit your creations hereThis is a hack to skip the default validation drawer and replace it with an identical class that has different drawing logic. The tooltip of the prefix label is set to have the error. (does not work if the prefix is disabled through some other mean)
Simply drop this script into your project's Editor folder or assembly.
The tooltip of labels (when mouse hovered) will be replaced with the error message. Also works with warnings!
Get the script on Github