Introduction
Terms
Create Agent with Langchain:
  Agent with Memory
  InMemorySaver: Similar static, global variable in C. Available to all agent calls
  Context Schema: Similar to local variables, only available for 1 agent call.
  Agent for Llama LLM(system_prompt, messages, model params)
  Agent using Web Search Tool
  MCP Server, Client created using Langchain
  Multimodal agent
  Multi Agent System: SubAgent-1(Square), SubAgent-2(Squareroot), Main Agent calling sub agent