AI Agents
Dec 15, 2025
Function Calling & Tool Use Implementation Guide - Complete Explanation of Core AI Agent Technology
Function Calling and Tool Use are essential for AI agent development in 2025. This article provides practical explanations of everything engineers should know, from implementation comparisons across OpenAI, Anthropic, and Google, to building autonomous agents with ReAct patterns, and production operation considerations.
Function Calling
Tool Use
AI Agent
OpenAI
Anthropic
