Exploring GraphQL Schema for Function Calls Input Parameters

Hi friends! For defining function calls input, I wonder if anyone had experience with GraphQL schema instead of JSON schema for input parameters? I assume ultimately it comes down how good the LLM is at generating good GraphQL to get the job done, so I'm curious if anyone had tried and if so, which models did you use? The GraphQL schema option is especially appealing to us because: 1) seems more concise than JSON schema; 2) allows to skip unnecessary fields in the response which really cuts down the token usage.