To mitigate the vulnerability of mismatched data type declarations in the privacy policy for Contacts, it is essential to regularly review and update the policy to ensure that it accurately reflects how the data is being used. This includes conducting regular audits of data handling practices and making any necessary adjustments to the policy to align with current practices. Additionally, providing clear and transparent communication with users about how their contact information is being collected, stored, and used can help build trust and ensure compliance with privacy regulations.