The Validations module provides an easy out-of-the-box way to verify that the content of a message in your flow matches a given set of criteria.
The main advantage this has over using Filters is traceability, as filters all raise identical exceptions, making it hard for you to know where the exception was caused. Validators, on the other hand, raise an exception with a meaningful message attached. You can optionally customize this message and even the type of exception you want it to throw.
Note: This connector module only works with Mule 4 and Studio 7.