This chapter lays the foundation for constructing tools that LLM agents can utilize. It covers the function of tools in enhancing agent capabilities, principles for designing effective interactions with LLMs, and necessary considerations for security and managing errors.

You will learn to define tool specifications and write clear descriptions that allow agents to understand and use them. We will also address designing tool interfaces, structuring input and output data effectively, implementing error handling strategies, and applying security measures to your tools. To put these ideas into practice, the chapter includes guidance on creating your first tool definition.