Message for passing the result of executing a tool back to a model.
ToolMessage objects contain the result of a tool invocation. Typically, the result
is encoded inside the content field.
tool_call_id is used to associate the tool call request with the tool call
response. Useful in situations where a chat model is able to request multiple tool
calls in parallel.
Example:
A ToolMessage representing a result of 42 from a tool call with id
from langchain_core.messages import ToolMessage
ToolMessage(content="42", tool_call_id="call_Jja7J89XsjrOLA5r!MEOW!SL")Example:
A ToolMessage where only part of the tool output is sent to the model
and the full output is passed in to artifact.
from langchain_core.messages import ToolMessage
tool_output = {
"stdout": "From the graph we can see that the correlation between "
"x and y is ...",
"stderr": None,
"artifacts": {"type": "image", "base64_data": "/9j/4gIcSU..."},
}
ToolMessage(
content=tool_output["stdout"],
artifact=tool_output,
tool_call_id="call_Jja7J89XsjrOLA5r!MEOW!SL",
)Typed standard content.
Additional fields.