When were you thinking of adding it?
I don’t think that would be too much at all.
When I brewed my pumpkin ale a month or so ago I added
1 tsp cinnamon
1/4 tsp nutmeg
1/4 tsp clove
1/2 tsp ginger
1/2 tsp allspice
Mixed it all together and heated it slightly on the stove and added with 5 minutes left in the boil.
Personally I think it is just about right. Good smell, especially in the head of the beer and a subtle but noticeable flavor on the front end.
As it ages, it is almost too faint, but all in all, I think it is about right, but it is all about personal preference