Who's Calling Your Service? Designing for Humans and Agents at the Same Time (opens in new tab)

We're building three interfaces for Azure SRE Agent: an interactive CLI for humans at a terminal, an agent mode for coding agents that spawn it as a subprocess, and an MCP server for humans inside coding agents and for remote agents in other ecosystems. The CLI and agent mode are coming. The MCP server ships first. That ordering wasn't obvious at first, and this post is about why we landed there. Three interfaces, one question: who's actually calling this? When we started designing the Azure ...