Per the IRS instructions for Form 8949:
Your "description" should include the number of shares sold and the stock/mutual fund name. You can use the stock ticker symbols or abbreviations to describe the property as long as they are based on the descriptions of the property as shown on Form 1099-B or 1099-S (or substitute statement).
Based on these instructions, it should be okay to identify the item sold with the cusip number in addition to the number of shares sold.
