The Riza Tools API has been launched, extending the capabilities of the existing Code Interpreter API by allowing users to save and execute functions on demand, with added support for structured inputs. This API is useful for developers building AI agents, enabling them to deploy and invoke user-defined tools or even allowing AI agents to create their own tools. A step-by-step guide is provided for creating, executing, and managing tools through the Riza Dashboard, which supports Python, JavaScript, or TypeScript functions. The API's integration with popular LLMs, such as OpenAI's Function Calling API, is highlighted, showcasing seamless tool execution and interaction. The API also includes a Secrets API for secure management of secrets during tool execution. Users are encouraged to explore the API for free and engage with the community to share their creations.