Be sure to tell the truth to avoid subsequent disputes. Underwriting may require a complete set of large medical records, as to how the insurance company handles it, and so on. The most important thing to buy insurance is to read the terms of the insurance contract by yourself, with emphasis on insurance liability and liability exemption. In addition, you can compare the rates and coverage, services, solvency, etc. of various companies, and then buy according to your own needs.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.