According to the dictionary, incisive mean:

adjective

1. penetrating; cutting; biting; trenchant: an incisive tone of voice.
2. remarkably clear and direct; sharp; keen; acute: an incisive method of summarizing the issue.

To be a good leader you need to be incisive, especially when it comes to cutting through confusion and asking direct questions.

Asking 99 bad questions before you get to 1 good one by accident is wasteful: you need to get to the facts as clearly and quickly as possible.

Leaders need to practice incisiveness. You are always being judged by your team, and if they see you waffling and fumbling to get to the point, they will lose respect for you.