Needs IronPython!! As asked for. This gets the names, and rects of the tiles on your start screen. I also found that it grabs text of a start tile. Yay accessibility!

Search_Start.py

import ctypes
from ctypes import wintypes
#import pyscreenshot as ImageGrab
titles=[]
def GetHWND(self, hwnd, lParam):
    if IsWindowVisible(hwnd):
        length = GetWindowTextLength(hwnd)
        buff = ctypes.create_unicode_buffer(length + 1)
        GetWindowText(hwnd, buff, length + 1)
        if buff.value != u'':
            titles.append(hwnd)
        else:
            pass
    return True
EnumChildren = ctypes.windll.user32.EnumChildWindows
import clr
clr.AddReference('UIAutomationClient')
clr.AddReference('UIAutomationTypes')
from System.Windows.Automation import *
import System



EnumWindowsProc = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.POINTER(ctypes.c_int),
                                                  ctypes.POINTER(ctypes.c_int))

    
def GrabStart(hwnd):
    Rect=wintypes.RECT()
    ctypes.windll.user32.GetWindowRect(hwnd, ctypes.byref(Rect))
    win_box=(Rect.left,Rect.top,Rect.right,Rect.bottom)
    _hwnd=System.IntPtr(hwnd)
    _mainWindow=AutomationElement.FromHandle(_hwnd)
    start_list=None
    Lists=_mainWindow.FindAll(TreeScope.Children, PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.List))
    for _list in Lists:
        name=_list.GetCurrentPropertyValue(AutomationElement.NameProperty)
        if "Start Apps" in name:
            start_list=_list
    if start_list:
        groups=start_list.FindAll(TreeScope.Descendants, PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.ListItem))
        print("========================")
        for tile in groups:
            print(tile.GetCurrentPropertyValue(AutomationElement.NameProperty))
            print("-------------")
            print(tile.GetCurrentPropertyValue(AutomationElement.BoundingRectangleProperty))
            print("========================")
            
    else:
        print("no start list found")
    
    
    
    
    

while 1:
    fore=ctypes.windll.user32.GetForegroundWindow()
    name_buff= ctypes.create_unicode_buffer(6)
    ctypes.windll.user32.GetWindowTextW(fore,name_buff,6)
    name=name_buff.value
    if name!=u"Start":
        continue
    class_buff=ctypes.create_unicode_buffer(28)
    ctypes.windll.user32.GetClassNameW(fore, class_buff,28)
    class_name=class_buff.value
    if class_name!= u"Windows.UI.Core.CoreWindow":
        continue
    else:
        GrabStart(fore)
        break