Is Kyoto Protocol legal?

Could you please clarify for me if the Kyoto Protocol is indeed a legally binding agreement? I'm curious to understand if the participating nations are obligated to adhere to the emission reduction targets outlined within the protocol, and if there are any consequences for failing to meet those targets. Additionally, I'm interested in knowing if the Kyoto Protocol has been ratified by a sufficient number of countries to be considered legally enforceable on a global scale. Thank you for your time and consideration.