Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: The outgoing head of the armed forces, General Sir David Richards, has given a blunt assessment over any military action in Syria, on the day his role officially passed to his successor.

Syria crisis: Outgoing UK defence chief warns over military action