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AWS introduces ToolSimulator, an LLM-powered framework within Strands Evals that enables safe, scalable testing of AI agents without risking live API calls or data exposure.

Amazon AI Blog · April 20, 2026

AWS introduces ToolSimulator, an LLM-powered framework within Strands Evals that enables safe, scalable testing of AI agents without risking live API calls or data exposure.

AI Summary

  • •ToolSimulator uses LLM-powered simulations instead of live APIs to test AI agents, eliminating risks of exposing personally identifiable information (PII) or triggering unintended actions
  • •Available now as part of the Strands Evals Software Development Kit (SDK), it replaces brittle static mocks with dynamic simulations that work across multi-turn workflows
  • •Helps developers catch integration bugs early, comprehensively test edge cases, and deploy production-ready AI agents with greater confidence
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