Katara is a waterbender - one who can control and manipulate all forms of water. She's been named a waterbending master, but what exactly that means beyond a title of respect is unclear.
She can not create water though she can pull moisture out of the air or ground for use. She is also able to heal through the use of water though the extent of that power isn't known. She has healed burns and partially healed brainwashing at this point in canon. The indication seems to be that a greater degree of healing can be achieved, but Katara is not yet at that level.
She can manipulate water for a variety of purposes from collecting it into a small hovering ball to lashing out with it as a whip against a person or to cut a rope, fabric, or even cut metal. She can make waves, pull water to her, create and manipulate ice, create small waterspouts, trap people in ice if she has enough water at her disposal.
Re: Inherent Abilities
She can not create water though she can pull moisture out of the air or ground for use. She is also able to heal through the use of water though the extent of that power isn't known. She has healed burns and partially healed brainwashing at this point in canon. The indication seems to be that a greater degree of healing can be achieved, but Katara is not yet at that level.
She can manipulate water for a variety of purposes from collecting it into a small hovering ball to lashing out with it as a whip against a person or to cut a rope, fabric, or even cut metal. She can make waves, pull water to her, create and manipulate ice, create small waterspouts, trap people in ice if she has enough water at her disposal.