From the source
Amazon announces runtime domain and published-date filtering for Web Search on Amazon Bedrock AgentCore, shipping in web-search connector version 1.2.0.
The release also expands Web Search availability to eu-west-1 (Dublin) and ap-northeast-1 (Tokyo).
Runtime filters allow per-request control over domains and publication dates, and combine with admin-level policies in a layered model where runtime filters can only narrow, not expand, the scope.
The evidence excerpt is the first sentence of the announcement paragraph.