Verified80% confidenceSolutionExact time
The core mechanism of Function Calling is that developers describe external function signatures in JSON Schema format, and the model outputs structured JSON invocation instructions that conform to the schema specification.
7
Sources
80%
Confidence
Long-term
Relevance
7/14/2026
First Seen
Sources
语音驱动几何交互：LLM语义解析与Function Calling架构实践
Related Claims
VerifiedFunction Calling机制中，开发者将工具的名称、功能描述、参数Schema（通常为JSON Schema格式）注入到模型的请求中，模型输出结构化的JSON而非自然语言来调用工具82% similarUnverifiedTools are essentially function wrappers for external capabilities, paired with JSON Schema descriptions that enable the model to understand a tool's functionality and parameter format.79% similarPartially VerifiedStructured output imposes constraints on token generation during the decoding phase through JSON Schema or function-calling mechanisms, which is fundamentally different from requesting JSON-format output in the prompt.79% similarUnverifiedFunction Calling允许模型以结构化JSON格式输出工具调用请求，提升了与外部系统集成的可靠性78% similar
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