{
  "type": "object",
  "properties": {
    "model": {
      "type": "string",
      "description": "Specifies the Claude model version to use, e.g., claude-2, claude-3."
    },
    "messages": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "role": {
            "type": "string",
            "enum": ["user", "assistant"],
            "description": "The role of the message sender. 'user' represents the input, and 'assistant' represents the AI's responses."
          },
          "content": {
            "type": ["string", "array"],
            "items": {
              "type": "object",
              "properties": {
                "type": {
                  "type": "string",
                  "enum": ["text", "image"],
                  "description": "Type of content. Text or image."
                },
                "text": {
                  "type": "string",
                  "description": "Text content of the message."
                },
                "source": {
                  "type": "object",
                  "properties": {
                    "type": {
                      "type": "string",
                      "enum": ["base64"],
                      "description": "Encoding type of the image."
                    },
                    "media_type": {
                      "type": "string",
                      "enum": ["image/jpeg", "image/png", "image/gif", "image/webp"],
                      "description": "Media type of the image."
                    },
                    "data": {
                      "type": "string",
                      "description": "Base64 encoded image data."
                    }
                  },
                  "required": ["type", "media_type", "data"]
                }
              },
              "required": ["type"]
            },
            "description": "The content of the message. Can be a string for text or an array of objects for complex content (text, image)."
          }
        },
        "required": ["role", "content"]
      },
      "description": "An array of message objects, each specifying the sender's role and the content of the message."
    },
    "max_tokens": {
      "type": "integer",
      "description": "Maximum number of tokens the model will generate before stopping. Some models may stop before this limit."
    },
    "temperature": {
      "type": "number",
      "description": "Controls randomness in response generation, where 0 is deterministic and 1 is highly creative.",
      "default": 1.0,
      "minimum": 0.0,
      "maximum": 1.0
    },
    "top_p": {
      "type": "number",
      "description": "Controls nucleus sampling. The model will select tokens until a cumulative probability threshold is reached.",
      "default": 1.0,
      "minimum": 0.0,
      "maximum": 1.0
    },
    "top_k": {
      "type": "integer",
      "description": "Controls the number of top options considered when sampling tokens. Lower values reduce creativity.",
      "default": 500,
      "minimum": 0,
      "maximum": 500
    },
    "stop_sequences": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "A list of custom sequences that will cause the model to stop generating further content."
    },
    "stream": {
      "type": "boolean",
      "description": "If true, the model streams output incrementally via server-sent events.",
      "default": false
    },
    "system": {
      "type": "string",
      "description": "Optional system prompt to provide context and guidelines for how the assistant should respond."
    },
    "metadata": {
      "type": "object",
      "description": "Additional metadata relevant to the request."
    },
    "tools": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string",
            "description": "Name of the tool the model may use."
          },
          "description": {
            "type": "string",
            "description": "Optional, but recommended, description of what the tool does."
          },
          "input_schema": {
            "type": "object",
            "description": "JSON schema specifying the expected input format for the tool."
          }
        },
        "required": ["name", "input_schema"]
      },
      "description": "Definitions of tools the model can use during the conversation."
    },
    "tool_choice": {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": ["auto", "any", "tool"],
          "description": "Specifies how the model should use the tools. Can be 'auto', 'any', or 'tool'."
        },
        "name": {
          "type": "string",
          "description": "Specifies which tool the model should use."
        }
      },
      "required": ["type"]
    }
  },
  "required": ["model", "messages"]
}