CrewAI Guardrails output issue

CrewAI Community Support
,
1

I am getting this error while running the guardrails

Failed to parse output into response format: 1 validation error for LLMGuardrailResult
  Invalid JSON: trailing characters at line 6 column 1 [type=json_invalid, input_value='{\n  "valid":       
true,\n  "...any prohibited content.', input_type=str]
    For further information visit https://errors.pydantic.dev/2.12/v/json_invalid

I found that the guardrails is supposed to output in the following way:

{
    "valid": bool,
    "feedback": str
}

I can see in the error output that my “valid” : True, but there is still some error. Is it because the llm I am using is not able to follow the instructions properly and it is not able to output in the correct format as expected by the guardrails?

2

Which LLM are you using? Are you able to try another one, such as GPT-5.2?