AI software for planning a task and doing the steps on its own.
A chatbot is the kid who talks about chores. An Agent grabs the broom.
You meet it in tools that sort email or book trips. It helps, but check its work like a new intern.
LLM
The Agent uses an LLM to understand the goal and plan the next move.
Function-calling
Function-call lets the Agent turn a plan into tool actions.
MCP
MCP gives the Agent one standard way to connect tools and data.
Framework
A Framework organizes the Agent parts into a working app.