Building Trust in Mental Health Chatbots: Safety Metrics and LLM-Based Evaluation Tools. - Jung In Park; Mahyar Abbasian; Iman Azimi; Dawn Bounds; Angela Jun; Jaesu Han; Robert McCarron; Jessica L. Borelli; Jia Li 054; Mona Mahmoudi; Carmen Wiedenhoeft; Amir M. Rahmani (CoRR, 2024)