Assistants not triggering registered function despite valid tool_choice

[_j]

The function must appear to be useful to the AI.

It is not merely some way of getting an output - the function by its description must describe some service offered to the AI that can help answer user questions. When you do that, there is no need to specify a tool choice (which can loop the AI if not used intelligently).

This assistant has a function:

{
  "name": "rand_int",
  "description": "A function that can generate true random integer numbers for the AI. Use for making choices, or whenever breaking deterministic behavior of language generation is desired or required.",
  "strict": true,
  "parameters": {
    "type": "object",
    "required": [
      "range_start",
      "range_end"
    ],
    "properties": {
      "range_end": {
        "type": "integer",
        "description": "The inclusive end of the range"
      },
      "range_start": {
        "type": "integer",
        "description": "The inclusive start of the range"
      }
    },
    "additionalProperties": false
  }
}

Observe the AI call the function when not instructed. The function is useful.

Funny thing though: the AI will still be making up an answer, because it didn’t pre-define for itself what value would be heads..