MCP server tool call delta for streaming responses.
@type t() :: %Gemini.Types.Interactions.DeltaMCPServerToolCallDelta{ arguments: map() | nil, id: String.t() | nil, name: String.t() | nil, server_name: String.t() | nil, type: String.t() }
@spec from_api(map() | nil) :: t() | nil
@spec to_api(t() | nil) :: map() | nil