Non-dog owners most likely won’t understand, but those who have a dog know that there are different types of barks. Barking can indicate that a dog is sensing some danger or urgency, but can also indicate pain. Short barks typically are more playful.
While bringing a toy can mean that your dog wants to play, other times it shows that your dog wants to gain your respect as their owner. Some say that it can also mean that the dog is bringing you an object to show trust in their owner.