AI Architecture
Function Calling & Tool Use: Connecting LLMs to External APIs and Databases
Architect robust tool-calling loops that empower LLMs to safely query SQL databases, fetch live weather, or trigger transactional webhooks.
3 min
The Core Tool Calling Loop
The model receives tool definitions as JSON schemas, determines when to invoke a tool, returns parameters, receives execution output from the backend, and synthesizes the final user answer.