MCP v2: Why AI Tools Stopped Needing to Remember You

Wed, 19 Aug 2026 00:29:22 +0900

🤔 What Is It?

MCP v2

MCP v2 is a big rulebook update for how AI apps talk to outside tools — it changed things so no tool has to specifically remember you between messages anymore, which makes those tools much easier to run at huge scale.

🧩 Like a diner that stopped giving you a personal waiter

The old rulebook (MCP v1) worked like a diner that assigns you one specific waiter the moment you sit down. That waiter memorizes your table, your order, and your preferences in their head — but if that exact waiter goes on break or the diner suddenly gets slammed with customers, things fall apart, because nobody else remembers you. MCP v2 changed the rule: now every single order ticket has to include everything the kitchen needs written right on it — your table number, your order, any allergies. That means literally any waiter or cook in the building can pick up any ticket and handle it perfectly, with zero memorizing required. The diner can now bring in extra staff the moment it gets busy, because nobody has to be ‘your’ personal person anymore.

Ai-Protocols on Explain It

MCP v2: Why AI Tools Stopped Needing to Remember You

🤔 What Is It?

🧩 Like a diner that stopped giving you a personal waiter