{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Tool",
  "type": "object",
  "description": "Definition of a tool that the model can use.",
  "properties": {
    "name": {
      "type": "string",
      "description": "The name of the tool. Must match the regex ^[a-zA-Z0-9_-]{1,64}$."
    },
    "description": {
      "type": "string",
      "description": "A detailed description of what the tool does, when it should be used, and what each parameter means."
    },
    "input_schema": {
      "type": "object",
      "description": "JSON Schema object defining the expected parameters for the tool."
    },
    "type": {
      "type": "string",
      "description": "The type of tool. Omit for custom tools. Use specific type strings for server tools like web_search_20260209, code_execution_20260120, text_editor_20250728, etc."
    }
  }
}