Hi Bruno,
The information and methods that we have for Self-Certification are all contained within the documented steps and methods:
Self-Certification - CA Performance Management - 3.6 - CA Technologies Documentation
That being said, what sort of tool are you looking for? Something to assist with the XML formatting or something specific to the MIB side of things?
Also, instead of self-certification, did you know that you can open a support case and get the Performance Management certification team to design a certification for inclusion within the product itself? These certifications are also generally released to the On-Demand Certification Portal as well:
Requirements for Performance Management Certificat - CA Knowledge
CA Performance Management On-Demand Certifications - CA Technologies
Regards,
Troy