500 Command Points
The tinker command is used to apply enhancements to items. Most enhancements require some kind of raw component, and you will also require a suitable pattern to work from (unless you have previously memorised it). A failure will consume the raw component, and also run the risk of damaging the target item.
tinker [with] <object> [to] [apply] <string> using <object>
> tinker with claymore to apply keen edge using whetstone
You cannot tinker with the steel claymore because an item must be in top condition to be tinkered with and the whetstone must be of at least quite bad quality, and made of a material with at least very low durability.