Custom error message when using tool with missing required argument

[wistuba]

Sometimes the LLM "forgets" to pass a required argument of the tool. This raises an error like this:

 Error: 1 validation error for TOOL_NAMEargs
NAME OF MISSING ARG
  Field required [type=missing, input_value={XXX}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.10/v/missing

This is some pydantic error caused by some evaluation that fails because the missing argument is not provided. How can I catch this and raise my own error with a more meaningful response?

[ekzhu]

Are you using AssistantAgent? For now, if you need to manage custom errors it's better to write your own agent, and manage the tool call loop yourself