topiccore

Function / Tool Calling

Give the model function signatures; it picks which to call with what args.

4 hours2 resources1 prereqs

For modern LLMs, this collapses structured output + intent classification + parameter extraction into a single step.

Pattern:

{
  "name": "get_weather",
  "parameters": {
    "city": "Istanbul",
    "unit": "celsius"
  }
}

The model emits this JSON, you call the real function, then feed the result back. Foundation of agent loops.

Prerequisites