Which term best describes someone who is ambidextrous?

The term that best describes someone who is ambidextrous is one that denotes proficiency with both hands. Ambidextrous individuals possess the ability to use both their left and right hands with equal skill and ease. This characteristic is particularly noteworthy in activities that require hand coordination, as it allows for greater versatility and adaptability.

In contrast, descriptions such as being "clumsy with both hands" or "skilled at using one hand" do not accurately capture the definition of ambidexterity. The former suggests a lack of coordination, while the latter implies proficiency limited to one hand, which is the opposite of being ambidextrous. The option referring to "only able to use tools" also does not pertain to the concept of being ambidextrous, as it does not address the comparative skill involved with both hands. Therefore, the term indicating equal skill with both hands is indeed the most appropriate choice.