EDUCATION & TRAINING
How to test whether your AI agent calls the right tool (instead of hallucinating)
Dev.to Machine Learning
About This Tutorial
Your agent has 12 tools registered. You ask it to look up a customer's order status. It calls search_knowledge_base instead of get_order_status. No error is thrown - the agent returns a plausible-sounding text response. You might ship it without realizing the mistake. This is the most common silent failure mode in tool-using agents, and many teams lack a systematic way to catch it. Why Tool Selection Fails LLMs don't "know" which tool to call - they predict the most likely next token given the prompt.