Understanding MCP Authorization

MCP (Model Context Protocol) requires authorization controls as it moves from local experimentation to production deployments. The protocol enables AI models to interact with external tools and APIs dynamically, but without authorization, every connected client can access all exposed tools. Authorization in MCP works through server-side enforcement at request time, not connection time, using patterns like token-based authorization, scoped capability access, and role-based policies. Best practices include applying least privilege, using short-lived scoped tokens, authorizing every tool call individually, and making all access auditable. Strong authorization boundaries are essential for safely deploying MCP in shared environments and production systems.