Generate OpenAI Tool Schemas in the Playground

OpenAI's GPT-4.1 guide notes that developers can use the "Generate Anything" feature in the Prompt Playground (or a meta-prompt) to create clean initial tool definitions with clear names and parameter descriptions.

Generate an OpenAI function-calling JSON Schema definition for a tool that queries customer invoices. Ensure the tool and every parameter are named clearly to indicate their purpose, backed by concise descriptions inside each description field.