Deep Dive into Open Agent SDK (Part 2): Behind the 34 Built-in Tools

The previous article analyzed how the Agent Loop works, including one crucial step: "execute tools." When the LLM says "I need to call Bash," the SDK actually spawns a process to run the command. But the tool system behind this is far more nuanced than simply "calling a function." How are 34 built-in tools organized? How do you safely convert the LLM's JSON input into Swift types? How do you control which tools are available? This article starts from the protocol definition and examines the Ope...