He handled the situation in the Vulcan arc really well. And when Reed questioned his decision to alert the Andorians, he treated Reed like and adult and reponded civily.
REED: I've got two teams working on it. Both launchers should be online in a few hours.
TUCKER: Anything else?
REED: Permission to speak freely? Admiral Gardner ordered us to return to Earth, yet we've set a course for Andorian territory.
TUCKER: We are going back. We're just taking a small detour first.
REED: Have you told Starfleet you're planning to warn the Andorians?
REED: Have you any idea what the Admiral will do when he finds out?
TUCKER: I'll save you a seat at my court-martial. Is there anything else?
REED: The Vulcans have legitimate reasons for launching this strike. If we alert the Andorians, we will be betraying our closest ally.
TUCKER: I'm trying to prevent a war, Malcolm. A war that Earth could get draw into.
REED: With all due respect, sir, we shouldn't get involved.
TUCKER: We're already involved. (doorbell) Come in.
TUCKER: That'll be all, Lieutenant.