1. given too much information or instruction in a briefing; excessively briefed
Usage: informal; often used in military, corporate, or organizational contexts

Examples

• The soldiers felt overbriefed before the mission, having received hours of redundant information.
• She complained that the team was overbriefed on minor details and lacked clarity on the main objective.
• The executives were overbriefed with statistics that obscured the core business strategy.
• After an overbriefed presentation, the staff was confused rather than prepared.
• He argued that the new employees were overbriefed during orientation and couldn't retain the essential points.