```python
def carve_shift(start: int, end: int, span: int, rest: int, least: int) -> list:
    if not all(isinstance(x, int) for x in [start, end, span, rest, least]):
        raise ValueError("All arguments must be whole numbers.")
    if start >= end or span < 1 or rest < 1 or least < 1 or least > span:
        raise ValueError("Invalid argument values.")
    
    stretches = []
    current = start
    while current < end:
        stretch_end = min(current + span, end)
        if stretch_end - current < least:
            break
        stretches.append((current, stretch_end))
        current = stretch_end + rest
    
    return stretches
```