InjectedToolCallId Class — langchain Architecture

Architecture documentation for the InjectedToolCallId class in base.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  ab8eb42c_4742_06de_dfb3_94321a7bdac0["InjectedToolCallId"]
  85ecb5bd_fbe3_a926_8a1c_56bb2ae9df14["InjectedToolArg"]
  ab8eb42c_4742_06de_dfb3_94321a7bdac0 -->|extends| 85ecb5bd_fbe3_a926_8a1c_56bb2ae9df14
  80cebff4_efbd_4311_85e9_de0dc81a7eee["base.py"]
  ab8eb42c_4742_06de_dfb3_94321a7bdac0 -->|defined in| 80cebff4_efbd_4311_85e9_de0dc81a7eee

Relationship Graph

Source Code

libs/core/langchain_core/tools/base.py lines 1396–1419

class InjectedToolCallId(InjectedToolArg):
    """Annotation for injecting the tool call ID.

    This annotation is used to mark a tool parameter that should receive the tool call
    ID at runtime.

    ```python
    from typing import Annotated
    from langchain_core.messages import ToolMessage
    from langchain_core.tools import tool, InjectedToolCallId

    @tool
    def foo(
        x: int, tool_call_id: Annotated[str, InjectedToolCallId]
    ) -> ToolMessage:
        \"\"\"Return x.\"\"\"
        return ToolMessage(
            str(x),
            artifact=x,
            name="foo",
            tool_call_id=tool_call_id
        )
    ```
    """