Almost everything in Scrum can be seen as protecting the team.

ONE example (there are many):

Problem: vague requirements

Solutions in Scrum:

• Acceptance criteria on stories need to be clear
• whole team grooms the story, everyone understands it and does planning poker to agree on costs. If the team doesn't all understand it, it doesn't get past this point
• only fully groomed stories get into a Sprint and get worked on.
• EVEN IF YOU GOT IT WRONG, you demo what you did every sprint, and the stakeholders can ask for additional work in a future story, reducing the cost of getting it wrong once.