He's going to get a lot more attention when that holy sword gets delivered to the empire
Depends on how she spins it with her report.
She has to report the sword obviously since she has it, but she can make up the details that others can't check.
Since Shirou is known to be ordering golems around and 'they just randomly shows up'
She can spin it as one of the golem took away something from the junk pile, then later came back with the holy sword.
It put the attention on the golem/island itself rather than Shirou himself this way.