If you’re wanting a record in case you’d make the same item again, I’d add the following to your list:
[li]Needle size(s); and if it makes a difference to your knitting, what type
[/li][li]Gauge you achieved
[/li][li]What size you made
[/li][li]Any notes on modifications you make
[/li][li]How much yarn you used
[/li][li]Whether or not you liked the pattern, what you’d change if you’d do it again, etc.
Otherwise, what you’ve listed would work fine for a historical record and to remind you how to wash the item.
And I’m with Jan. I use Ravelry. I tend to add notes for myself to remind me just what I might have actually done to make it fit properly, etc. And on big projects in a kind of diary format because it lets me see just why/what made it take so long. And I read everyone else’s notes before I start a pattern to see what kind of common modifications get made so I can consider that in planning for my project.