AWS MCP Server Just Gave AI Agents Your Cloud Keys — Here's Why That Should Worry You

You're reviewing your AWS bill. $14,000 this month — up from the usual $3,200. You trace it back to a Copilot session from last Tuesday where a dev asked the agent to "clean up old EC2 instances." It terminated 47 instances across three regions, including one that was handling a critical payment reconciliation job.

This is the future AWS MCP Server just handed you.

The Setup

AWS MCP Server went GA in May 2026, and the JP dev community (via a Qiita deep-dive by user hiyahyahyahyahoooi) published one of the first practical walkthroughs connecting it to GitHub Copilot's cloud agent mode. The promise: natural language cloud management. "Terminate unused instances." "Check S3 bucket policies." "Scale the ECS cluster." No console. No CLI. No terraform.

I tested it. Here's what the marketing didn't cover.