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
Related Entities
Related Claims
UnverifiedWhen defining tools with the @tool decorator, LangChain automatically generates a JSON schema from type annotations and docstrings to send to the model; the clearer the docstring, the higher the tool-calling accuracy.71% similarUnverifiedLangChain uses Pydantic to convert function signatures into JSON Schema, which is then injected into requests sent to the LLM.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% similarUnverifiedThe API signature mechanism generates an unforgeable signature value by combining request parameters with a key according to specific rules and then performing a hash operation.68% similar
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