Which is the main way the bill of rights protected against the tyranny that the anti-federalists feared?

The Bill of Rights guarantees civil liberties.

Explanation:

The Constitutional Convention, carried out in Philadelphia in 1787 gave way to The Bill of Rights, a docuement related to the 10 amendments to the constitution, which consists of the guarantees given to the citizens and their freedom. In this sense, the document assured liberty and Anti-federalists felt convinced and willing to sign the Constitution. However, not everybody thought it was a good idea to be that strict and the consequences it would have.