How should a controller respond when a pilot declares "minimum fuel"?

When a pilot declares "minimum fuel," it indicates that the aircraft has just enough fuel to reach the destination but cannot accept any prolonged delays. This situation requires the controller to prioritize the aircraft's landing and take measures to ensure that it can land safely and without undue delay. Responding by avoiding unnecessary delays helps streamline the arrival process and mitigates the risk of an emergency developing due to the fuel constraints.

Providing additional traffic information might, in some cases, be helpful, but it's secondary to addressing the immediate priority of the aircraft that has reported minimum fuel. Similarly, requiring the pilot to hold creates a potential risk given their fuel situation, which would be inappropriate. Preparing for an emergency landing is based on a more serious condition than just minimum fuel; rather, the focus is on facilitating a safe and efficient landing for the aircraft in question. Therefore, prioritizing the avoidance of undue delays is the most appropriate and responsible action for the controller to take in this scenario.