Fallback for Tool Call Failures in Langflow Agent

[dhia-mahdaoui]

I’m using Ollama as an agent and sometimes the flow fails with an error where a tool call failed usually due to a validation issue (e.g., expecting a list but getting a string).

This caused the build to stop without returning a response. Here’s a snippet of the error:

langflow.exceptions.component.ComponentBuildError: Error building Component Agent:
1 validation error for InputSchema
urls
  Input should be a valid list [type=list_type, input_value=' < Api that I'm calling >...', input_type=str]

Instead of crashing, is there a way to add a fallback mechanism to return a generic error message (e.g., "Tool call failed, please check input") and keep the flow running? This would improve the user experience by avoiding silent failures ?