I could be mistaken, but my understanding was that the people most likely to interact with the suicidal or near suicidal (i.e. 988 suicide hotline attendants) aren't actually mental health professionals, most of them are volunteers. The script they run through is fairly rote and by the numbers (the Question, Persuade, Refer framework). Ultimately, of course, a successful intervention will result in people seeing a professional for long term support and recovery, but preventing a suicide and directing someone to that provider seems well within the capabilities of an LLM like ChatGPT or Claude