LLM-powered agents are gaining popularity and 2026 is set to be the year of agents just like 2025. Generative AI applications have now moved from normal chatbot applications, search and retrieve systems to building more of autonomous agents that can break bigger tasks down in smaller sub-tasks, achieving a goal while also interacting with environment. Before diving deeper into LLM powered agents and tools to create one let's start by answering the most important question What is an Agent?According to the gold standard definition that comes from Artificial Intelligence: A Modern Approach textbook by Stuart Russell and Peter Norvig "An agent is anything that can be viewed as perceiving its environment through sensors and acting upon that environment through actuators."