The Kutagarashala is described as a hut with a pointed roof. From the options provided, option 2: A place where intellectual debates among Buddhist mendicants took place, seems to be the most accurate explanation for what the Kutagarashala was.

Option 1: A place where animals were kept, does not align with the description of the Kutagarashala as a hut. It is more commonly known as a shelter for animals, such as a stable or barn.

Option 3: A place where weapons were stored, is not mentioned in the description of the Kutagarashala. There is no indication that it was used for storing weapons.

Option 4: A place to sleep, is too general and does not account for the specific characteristics mentioned, such as the pointed roof. It is unlikely that the Kutagarashala was solely used for sleeping.

In conclusion, the Kutagarashala was primarily a place where intellectual debates among Buddhist mendicants took place, as stated in option 2.