What exactly is an ideal thought?

I’ve been getting some conflicting feedback on thoughts lately.

In one instance, I was told to make thoughts concise and only keep the essential information, i.e. action + why you’re doing it.

In another one, I was told to add more details and was given a corrected example in this format: mention what’s on the page + why you’re doing it + what you’re doing. This example was three sentences and didn’t seem concise at all.

What is the most correct way to write them?