{
  "type": "object",
  "properties": {
    "candidates": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "content": {
            "type": "object",
            "properties": {
              "parts": {
                "type": "array",
                "items": {
                  "oneOf": [
                    {
                      "type": "object",
                      "properties": {
                        "text": { "type": "string" }
                      },
                      "required": ["text"]
                    },
                    {
                      "type": "object",
                      "properties": {
                        "functionCall": {
                          "type": "object",
                          "properties": {
                            "name": { "type": "string" },
                            "args": { "type": "object" }
                          },
                          "required": ["name", "args"]
                        }
                      },
                      "required": ["functionCall"]
                    }
                  ]
                }
              }
            },
            "required": ["parts"]
          },
          "finishReason": {
            "type": ["string", "null"],
            "enum": ["STOP", "LENGTH", "function_call", null],
            "description": "Reason for completion of generation"
          }
        },
        "required": ["content", "finishReason"]
      }
    },
    "safetyRatings": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "category": { "type": "string" },
          "probability": { "type": "string" }
        }
      }
    },
    "usageMetadata": {
      "type": "object",
      "properties": {
        "promptTokenCount": {
          "type": "integer",
          "description": "Number of tokens in the prompt, including cached content if applicable"
        },
        "cachedContentTokenCount": {
          "type": "integer",
          "description": "Number of tokens in the cached part of the prompt"
        },
        "candidatesTokenCount": {
          "type": "integer",
          "description": "Total number of tokens across all generated response candidates"
        },
        "totalTokenCount": {
          "type": "integer",
          "description": "Total token count for the entire generation request (prompt + response candidates)"
        }
      },
      "required": ["promptTokenCount", "candidatesTokenCount", "totalTokenCount"]
    }
  },
  "required": ["candidates", "usage"]
}