No Dumb Questions: What is an MCP server and why do I care?

A beginner-friendly Q&A explaining what MCP (Model Context Protocol) is and why it matters. MCP is a standardized protocol introduced by Anthropic in late 2024 that lets LLMs and AI agents connect securely to external data sources and tools, solving the complexity of custom API integrations at scale. The conversation covers how MCP differs from traditional APIs, why context is critical for productive AI agents, security considerations (including OAuth2-based authentication), and how Stack Overflow's Stack Internal MCP server works — including its bidirectional read/write capability that lets developers push knowledge back to the knowledge base without leaving their IDE.