Helper functions for declaring data in controllers.

Usually you would import this module in your controller modules:

defmodule MyApp.MyController do
  import McpServer.Controller

  # Tool content helpers
  def search_tool(_conn, %{"query" => query}) do
    [
      text_content("Found 5 results for: #{query}"),
      text_content("Result 1: ..."),
      text_content("Result 2: ...")
    ]
  end

  def generate_chart(_conn, %{"data" => data}) do
    chart_image = create_chart(data)
    [
      text_content("Chart generated successfully"),
      image_content(chart_image, "image/png")
    ]
  end

  def read_file(_conn, %{"path" => path}) do
    resource_content("file://#{path}", text: File.read!(path), mimeType: "text/plain")
  end

  # Resource content helpers
  def read_resource(params) do
    McpServer.Resource.ReadResult.new(
      contents: [
        content("file.txt", "file:///path/to/file.txt", mimeType: "text/plain", text: "File content")
      ]
    )
  end

  # Prompt helpers
  def get_prompt(_conn, _args) do
    [
      message("user", "text", "Hello!"),
      message("assistant", "text", "Hi there!")
    ]
  end

  def complete_prompt(_conn, _arg, _prefix) do
    completion(["Alice", "Bob"], total: 10, has_more: true)
  end
end