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# Source code for langchain_community.tools.arxiv.tool

    """Tool for the Arxiv API."""

    from typing import Optional, Type

    from langchain_core.callbacks import CallbackManagerForToolRun
    from langchain_core.pydantic_v1 import BaseModel, Field
    from langchain_core.tools import BaseTool

    from langchain_community.utilities.arxiv import ArxivAPIWrapper

    class ArxivInput(BaseModel):
        """Input for the Arxiv tool."""

        query: str = Field(description="search query to look up")

    class ArxivQueryRun(BaseTool):
        """Tool that searches the Arxiv API."""

        name: str = "arxiv"
        description: str = (
            "A wrapper around Arxiv.org "
            "Useful for when you need to answer questions about Physics, Mathematics, "
            "Computer Science, Quantitative Biology, Quantitative Finance, Statistics, "
            "Electrical Engineering, and Economics "
            "from scientific articles on arxiv.org. "
            "Input should be a search query."
        )
        api_wrapper: ArxivAPIWrapper = Field(default_factory=ArxivAPIWrapper)
        args_schema: Type[BaseModel] = ArxivInput

        def _run(
            self,
            query: str,
            run_manager: Optional[CallbackManagerForToolRun] = None,
        ) -> str:
            """Use the Arxiv tool."""
            return self.api_wrapper.run(query)