{"author":{"name":"Darren Wang","slug":"darren-wang","article_count":1,"latest_published_at":"2026-04-21T16:20:01.701+00:00","profile_url":"https://platform.waiboom.ai/authors/darren-wang","api_url":"https://platform.waiboom.ai/api/authors/darren-wang"},"articles":[{"slug":"toolsimulator-scalable-tool-testing-for-ai-agents","title":"AWS Releases ToolSimulator for Safe, Scalable AI Agent Testing","url":"https://platform.waiboom.ai/article/2026/04/21/toolsimulator-scalable-tool-testing-for-ai-agents","content_type":"model_release","summary":"AWS has released ToolSimulator, an LLM-powered tool simulation framework within Strands Evals that allows developers to test AI agents safely at scale without hitting live APIs. The tool addresses three core problems with live API testing: external dependencies that slow iteration, test isolation risks that can trigger unintended side effects, and privacy concerns around sensitive data exposure. ToolSimulator generates stateful simulations that handle multi-turn workflows, unlike static mocks that break when tool responses need to reflect state changes between calls.","published_at":"2026-04-21T16:20:01.701+00:00","updated_at":"2026-04-22T00:59:04.768177+00:00","source":{"url":"https://aws.amazon.com/blogs/machine-learning/toolsimulator-scalable-tool-testing-for-ai-agents/","name":"AWS Machine Learning Blog"},"featured_image":{"url":"https://d1.awsstatic.com/onedam/marketing-channels/website/aws/en_US/global-nav/aws-library_illustration_culture_2_1200.77dd122bde9af49ea0c09cdc009c193866f62ad7.jpg","alt":null},"categories":[{"name":"AI Agents","slug":"ai-agents"},{"name":"Infrastructure","slug":"infrastructure"},{"name":"Model Releases","slug":"model-releases"},{"name":"Coding / Dev Tools","slug":"coding-dev-tools"}]}]}