Qborfy AI

Jun 26, 2026 · Artificial Intelligence

Mastering Function Calling: Deep Dive into tools, tool_choice, and parallel_tool_calls for LLMs

This guide explains the three core Function Calling parameters—tools, tool_choice, and parallel_tool_calls—showing how to design tool schemas, control model autonomy, choose parallel execution, and avoid common pitfalls, with concrete Python and JavaScript examples and a cross‑platform comparison.