STOP Using MCP Like This - MCP 2.0 Saves 98% More Tokens
Anthropic just dropped something that changes everything about building AI agents in production. Read the full breakdown here: https://www.anthropic.com/engineering/code-execution-with-mcp If you've been using Model Context Protocol (MCP), you might've noticed: - Agents hallucinating more than they should - Token costs spiraling out of control - Workflows breaking when they hit context limits Here's the truth: It's not because MCP is broken. It's because everyone's using it wrong. The Problem with Traditional MCP: When you connect multiple MCP servers (Gmail, Slack, CRM, databases), ALL tool definitions dump into your agent's context window immediately. Example: 6 systems with 15-20 tools each = 100+ function definitions loaded before the agent even reads what you want it to do. What this causes: - Tens of thousands of tokens just sitting there - Higher costs, slower responses - Agent gets confused and makes mistakes - 40,000 token documents flowing through context multiple times The Solution: Code Execution with MCP 2.0 Instead of presenting MCP tools as function calls, present them as a file system the agent explores. How it works: - Each MCP server = a folder - Each tool = a TypeScript file - Agent searches, finds what it needs, writes code to use specific tools - Results stay in sandbox OUTSIDE agent's context - Only final processed results (500 tokens vs 40,000) go back to agent Why this is massive: AI models are trained on millions of lines of code during pre-training. Tool calling is learned during post-training with way less compute. When agents write code to interact with MCP servers, you're leaning into what they're naturally exceptional at. Bottom line: Stop obsessing over which tool is "best." Ask which approach solves your specific client's problem most efficiently. This is what separates people who make real money from people who just collect tools. What are you building with MCP? Drop it below.