Testing Bedrock Guardrails without the AWS bill

Originally published on fakecloud.dev . Bedrock Guardrails are one of the better pieces of AWS infrastructure in the last year. You define a policy — filter out hate, block PII leakage, deny certain topics, enforce contextual grounding on RAG outputs — and either apply it to an entire model invocation via guardrailIdentifier , or call ApplyGuardrail directly on arbitrary text. Useful, sharp, limited-in-scope. The problem is testing. A serious guardrail config is an iterative thing — you tune fil