what are the words used to describe spongebob by mister krabs

Mr. Krabs most commonly describes SpongeBob as naive, optimistic, and square. That phrasing matches the familiar character-description style used in SpongeBob reference material.

If you meant how Mr. Krabs talks about SpongeBob in the show, the tone is usually one of these:

• Employee.
• Fry cook.
• Good-hearted, but a little clueless.
• Valuable to the Krusty Krab.

A simple version for your post would be:

Mr. Krabs would describe SpongeBob as naive, optimistic, and square.

If you want, I can also turn that into a cleaner forum-style reply or a one- line caption.