Unverified85% confidenceFactTime unknown
LangChain的@tool装饰器通过Python的inspect模块提取函数签名，结合Pydantic进行类型验证，生成符合OpenAI Function Calling规范的JSON Schema
1
Sources
85%
Confidence
Long-term
Relevance
5/31/2026
First Seen
Sources
LangChain v0.3 Agent教程：工具定义、构建与执行全流程
youtubeJames Briggs
Related Entities
Related Claims
Unverified使用@tool装饰器定义工具时，LangChain会自动从类型注解和docstring生成JSON schema发给模型，docstring写得越清晰工具调用准确率越高71% similarUnverifiedLangChain利用Pydantic将函数签名转换为JSON Schema，该Schema被注入到发送给LLM的请求中70% similarUnverified在FastMCP中，函数的类型提示和文档字符串会自动转换为符合JSON Schema规范的工具模式，无需手写JSON Schema68% similarUnverifiedAPI签名机制通过将请求参数与密钥按特定规则组合后进行哈希运算来生成不可伪造的签名值68% similar
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