According to the PMBOK Guide, the project manager should adapt their leadership style to the needs and preferences of the team and the project context. In an agile project, the project manager should facilitate the team's self-organization and empowerment, rather than directing or controlling them. The project manager should also provide coaching and mentoring to the team members who need guidance and support, and foster a collaborative and trusting environment where the team can deliver value and learn from feedback. The project manager should not use a directive, passive, or democratic style, as these may not suit the agile principles and values, and may hinder the team's performance and morale. References: PMBOK Guide, 7th edition, pages 51-52, 55-56.