Even when adding "use exact text 'true'" to the description, the model ignores the instruction and hallucinates conversational text in the field. Note: I can't use "const" here because I need the specific value to show up in the logs for debugging, so I need a prompt-based fix or a model adjustment. Example: Call ID: call_14cd623c81f0b2b8df667b4bac7 Expected: "initial": "true" Actual: "initial": "Schedule a private venue tour for the caller." _ "properties": { "initial": { "type": "string", "description": "use this exact text 'true'" } } Part of Actual JSON Sent to Backend: { "initial": "Schedule a private venue tour for the caller." ...... } https://cdn.discordapp.com/attachments/1463101676666884176/1463101677837090816/image.png?ex=6979d59f&is=6978841f&hm=d1676f6a193dc73b5a7786b8eebd84b35cfe3bd1e4c2217a7d277d211ce83634&

hello

const value does not show value in Retell's "Details Logs" which is not understandable why would anyone in Retail thought it was good idea at first place.

not limited to just OpenAI models. You'll need to check your dashboard to see if it's supported for your selected model

sorry I would also add Claude, but Gemini doesn't support that right? and what are reasons behind it?

Its because each LLM provider have different structured output capabilities. You need to try different provider as there is no specific list of which provider support it

fair, thanks mate.

yes