HashiCorp Vault Radar is a security tool that detects secret leaks and identifies unmanaged secrets in code repositories. To fine-tune its detection capabilities, users can configure it using regular expressions (regex), global ignore rules, repository-specific ignore rules, and exclusion rules. These configurations allow users to customize the scanning process to minimize false positives and ensure accurate results. By leveraging regex for custom patterns, avoiding overuse of ignore rules, testing changes in a staging environment, monitoring false positives, documenting rules, and connecting with Vault secrets manager, users can optimize their Vault Radar detection. HCP Vault Radar is a powerful combination with HashiCorp Vault, enabling enterprises to proactively manage secrets and leaks, reducing the risks of data breaches and unauthorized access.