🧪TDD Challenge·beginner·⏱️ 20–35m·⭐ 125 XP
M-038Build Your First Tool-Calling Agent
Description
Nebula Corp needs a simple agent that can look up customer information using tools. The skeleton is there — a tool registry and an LLM loop — but the agent doesn't actually call any tools yet. Wire up the tool execution so the agent can receive a tool call from the LLM, execute it, and feed the result back into the conversation.
Test Cases (3)
Executes tool call and returns result
Agent should call lookup_customer, get result, and produce a final answer
Input:runAgent('Look up customer C001')
Expected:CONTAINS:FINAL_ANSWER
Chains multiple tool calls
Agent should call lookup_customer then get_plan_details before answering
Input:runAgent('What plan is C001 on and how much does it cost?')
Expected:CONTAINS:FINAL_ANSWER
Handles unknown customer gracefully
Agent should handle missing customer and still produce a final answer
Input:runAgent('Look up customer C999')
Expected:CONTAINS:FINAL_ANSWER
Related Lessons
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