Sierra’s MCP Gateway: Unexpected Depth Behind a ‘Simple’ Integration
Sierra’s internal AI team spent 1½ engineers months building an MCP‑gateway that safely exposes its SaaS tools to agents. While MCP is marketed as a plug‑and‑play protocol, the diary reveals deep work on identity, permissioning, and deployment that any team adopting MCP will face. The post offers concrete lessons for scaling agent‑to‑data pipelines.