How does MBTI apply to workplace relationships?

The same way it applies to personal relationships: it explains differences. A J boss and P employee have different ideas about deadlines. An F colleague takes feedback personally; a T colleague doesn't. Understanding type helps you communicate effectively.

Should I disclose my MBTI type at work?

Carefully. In team-building contexts, yes. Individually to a boss or colleague? Only if you trust them and think it will help communication. Never use type as an excuse ("I'm INTJ, so I'm naturally cold."). You're still responsible for your behavior.

How do I work with someone whose type clashes with mine?

Focus on outcomes, not process. If your partner is ENFP and chaotic, ask for regular check-ins where they share timelines. If they're ISTJ and rigid, propose a weekly agenda so you can plan. Meet in the middle by understanding each other's needs.