The following comments assume your client is the buyer:
I've been reading threads here and there regarding whether or not inspectors should provide a copy of the report to their client's agent or not.
Even in states where you are specifically prohibited from giving the report to anyone but your client, the client's agent and the client's attorney are still considered by the courts to be "the client."
However, to be safe, you should generally try to get your client's permission to give his/her representative the report. This may be difficult when the representative shows up at the inspection without your client. In such cases, the fact that your client sent his/her representative to the inspection is implied permission to give the report to the representative.
It is interesting to note that in Pennsylvania, even the seller is entitled to a copy of the inspection report from your client. This from the PA home inspection law:
6 (b) Confidentiality.--Except as otherwise required by law, a
7 home inspector shall not deliver a home inspection report to any
8 person other than the client of the home inspector without the
9 client's consent. The seller shall have the right, upon request,
10 to receive without charge a copy of a home inspection report
11 from the person for whom it was prepared.
InterNACHI's post-inspection survey works great for getting these permissions (in writing).
If you write a robust report, it is in your best interest (from a marketing standpoint) to get a copy of your report (with permission from your client of course) into as many hands (agent's and seller's) as possible.