Start with what the contract actually says
Government security expectations are written into specific documents, and the details differ from one agency and one contract to the next. Before you build a policy, find the clauses that apply to you. In federal work, look at the solicitation, the contract clauses incorporated from the Federal Acquisition Regulation, any agency supplements, and the statement of work. State and local agencies often attach their own security exhibits or questionnaires to an RFP.
Defense contractors who handle Controlled Unclassified Information generally meet DFARS clause 252.204-7012 and the security requirements in NIST Special Publication 800-171, and the Department of Defense's Cybersecurity Maturity Model Certification program adds assessment requirements for many contracts. Those obligations are detailed and technical. If your work touches that kind of information, the contract will tell you which systems and controls are required, and a general-purpose tool may not be the right place for it. Ask the contracting officer before you assume.