Final answer:
A corporate culture of knowledge sharing, trust, and honest feedback is a critical success factor for internal Enterprise 2.0 tools.
Step-by-step explanation:
The critical success factor for internal Enterprise 2.0 tools is a corporate culture of knowledge sharing, trust, and honest feedback. This means that having an organizational culture that encourages and values the sharing of knowledge, fosters trust among employees, and promotes honest feedback is crucial for the success of these tools.