InfoBox

Used to provide additional information:

public class NaughtyComponent : MonoBehaviour
{
    [InfoBox("This is my int", EInfoBoxType.Normal)]
    public int myInt;

    [InfoBox("This is my float", EInfoBoxType.Warning)]
    public float myFloat;

    [InfoBox("This is my vector", EInfoBoxType.Error)]
    public Vector3 myVector;
}