@type t() :: %MCP.Protocol.Messages.Sampling.CreateMessageParams{
  include_context: String.t() | nil,
  max_tokens: integer(),
  messages: [MCP.Protocol.Types.SamplingMessage.t()],
  meta: map() | nil,
  metadata: map() | nil,
  model_preferences: MCP.Protocol.Types.ModelPreferences.t() | nil,
  stop_sequences: [String.t()] | nil,
  system_prompt: String.t() | nil,
  temperature: float() | nil
}