The UK Government and European Commission have published interpretations of the Agreement:
UK Government - Summary Explainer
European Commission - Q&A; Brochure; Overview of consequences and benefits
Other sources describing the content of the Agreement are:
The Institute for Government's explainer
Commentary from UK in a Changing Europe
House of Commons Library
Scottish Government reaction
On 25 December, the Cabinet Secretary for the Constitution, Europe and External Affairs, Michael Russell, was quoted saying:
A no deal outcome has thankfully been avoided but in the midst of a pandemic and economic recession...