First of all, if you have insurance, you should report this suit to your insurance company immediately. They will handle the defense, at no additional cost to you. However, if you wait too long to notify them, they may deny coverage.
You are required to fully answer all parts of the Request for Disclosure, and your failure to fo so will likely prevent you from introducing evidence at trial that should have been disclosed.
Discovery does work both ways, and your attorney will send a request for disclosure, as well as other discovery, to the Plaintiff.