website/content/en/docs/reference/command-line-tools-reference/feature-gates/DeclarativeValidationTakeover.md

title	content_type	_build	stages
DeclarativeValidationTakeover	feature_gate	list render never false	stage defaultValue fromVersion beta false 1.33

When enabled, along with the DeclarativeValidation feature gate, declarative validation errors are returned directly to the caller, replacing hand-written validation errors for rules that have declarative implementations. When disabled (and DeclarativeValidation is enabled), hand-written validation errors are always returned, effectively putting declarative validation in a mismatch validation mode that monitors but does not affect API responses. This mismatch validation mode allows for the monitoring of the declarative_validation_mismatch_total and declarative_validation_panic_total metrics which are implementation details for a safer rollout, average user shouldn't need to interact with it directly. This feature gate only operates on the kube-apiserver. Note: Although declarative validation aims for functional equivalence with hand-written validation, the exact description of error messages may differ between the two approaches.