  The usage of Artificial Intelligence (AI) systems has increased
exponentially, thanks to their ability to reduce the amount of data to be
analyzed, the user efforts and preserving a high rate of accuracy. However,
introducing this new element in the loop has converted them into attacked
points that can compromise the reliability of the systems. This new scenario
has raised crucial challenges regarding the reliability and trustworthiness of
the AI models, as well as about the uncertainties in their response decisions,
becoming even more crucial when applied in critical domains such as healthcare,
chemical, electrical plants, etc. To contain these issues, in this paper, we
present NeuralSentinel (NS), a tool able to validate the reliability and
trustworthiness of AI models. This tool combines attack and defence strategies
and explainability concepts to stress an AI model and help non-expert staff
increase their confidence in this new system by understanding the model
decisions. NS provide a simple and easy-to-use interface for helping humans in
the loop dealing with all the needed information. This tool was deployed and
used in a Hackathon event to evaluate the reliability of a skin cancer image
detector. During the event, experts and non-experts attacked and defended the
detector, learning which factors were the most important for model
misclassification and which techniques were the most efficient. The event was
also used to detect NS's limitations and gather feedback for further
improvements.
