Adding a POST resource to a ServiceNow MCP server means telling the model what the body accepts. An OpenAPI schema defines the properties, the types, and the required fields, so the AI can't invent them. 📘 Full written guide: https://www.servicenow.com/community/developer-advocate-blog/building-an-mcp-server-on-servicenow-and-connecting-claude-to-it/ba-p/3588171 #ServiceNow #MCP #RESTAPI #AI #OpenAPI