dspy-tools
Give Agents Tool-Calling Abilities with dspy.Tool
Guide the user through wrapping functions as DSPy tools, using dspy.PythonInterpreter for sandboxed code execution, and wiring tools into agents with dspy.ReAct and dspy.CodeAct.
What is dspy.Tool
dspy.Tool wraps a Python function so DSPy agents can call it. It automatically extracts the function's name, docstring, parameter types, and descriptions to build the tool schema that the LM sees.
You can pass plain functions directly to dspy.ReAct or dspy.CodeAct and DSPy wraps them for you. Use dspy.Tool explicitly when you need to override the inferred metadata, convert tools from LangChain or MCP, or inspect the generated schema.
import dspy
# Implicit -- pass a function directly (DSPy wraps it automatically)
agent = dspy.ReAct("question -> answer", tools=[my_search_function])
# Explicit -- wrap it yourself for control over name, description, etc.
tool = dspy.Tool(my_search_function, name="search", desc="Search the knowledge base")
agent = dspy.ReAct("question -> answer", tools=[tool])
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