@type t() :: %LettaAPI.Model.ToolSchema{
  args_json_schema: any() | nil,
  created_at: String.t(),
  description: String.t(),
  json_schema: LettaAPI.Model.ToolJsonSchema.t(),
  metadata_: %{optional(String.t()) => any()} | nil,
  name: String.t(),
  return_char_limit: integer(),
  source_code: String.t() | nil,
  source_type: String.t(),
  tags: [String.t()],
  tool_type: String.t(),
  updated_at: String.t()
}