The document discusses different API description formats including API Blueprint, RAML, and Swagger. It provides an overview of each format's key features such as how they model REST, available tooling, community size, and licensing. The conclusion is that while Swagger has the largest adoption, both RAML and API Blueprint offer some advanced features but lack tooling and community. The best choice depends on needs and technologies. Examples of other formats like WADL, Discovery Docs, and Hydra are also briefly mentioned.