ToolCall

class langchain_core.messages.tool.ToolCall

Represents a request to call a tool.

Example

{
    "name": "foo",
    "args": {"a": 1},
    "id": "123"
}

This represents a request to call the tool named “foo” with arguments {“a”: 1} and an identifier of “123”.

name: str

The name of the tool to be called.

args: dict[str, Any]

The arguments to the tool call.

id: str | None

An identifier associated with the tool call.

An identifier is needed to associate a tool call request with a tool call result in events when multiple concurrent tool calls are made.

type: NotRequired[Literal['tool_call']]

Examples using ToolCall

• How to handle tool errors