What does 2 Samuel 10:3 mean?

the Ammonite leaders said to Hanun, 'Do you really think David is honoring your father by sending these men to you? Isn’t he just using them to spy on our city and figure out how to conquer us?' 2 Samuel 10:3 - Modern Text Bible

(Hanun’s advisors are suspicious. They think David’s kindness is just a cover for spying and planning an attack.)