Embodiments relate to a method, computer program product, and a computer system for generating a tailored schema description of a web service from a predefined schema description of the web service is provided. The predefined schema provides a machine readable description of operations performed by the web service and a message format for communication with the web service. A subset of the predefined schema required to support an identified operation may be calculated based on at least one example message. A tailored schema may then be generated based on the calculated subset of the predefined schema.