The Dangerous Bugs Are the Ones That Don't Crash — Building Input Validation for My MCP Server

The Dangerous Bugs Are the Ones That Don't Crash: Building Input Validation for My MCP Server I was building an MCP server for an event platform that automates speaker communications (confirmations, reminders, calendar invites, follow-ups). An agent created a session confirmation for "Monday March 8th." March 8th was a Sunday. I caught it. But catching it was just the beginning. The confirmation email had already been drafted with "Monday March 8th." The calendar invite had the wrong day. The fo