We don't like to share. At least our policies that aren't part of specific work product for a customer. However, we recognize that some customers require certain documentation as part of their evaluation process. So, we don't have a hard-and-fast rule to limit distribution. But why do we prefer to not distribute our policies?
Even knowledge of "routine" DevOps can give bad actors knowledge to damage us. Separately, it's hard to screen all sensitive information. Any documentation about our processes, security measures, policies, architecture, logging, and so on is part of our critical infrastructure. We understand that NDAs can minimize exposure, but not totally, and it's for this reason that we severely limit distribution.
These documents are often written by technical staff for internal technical staff. As such, however much we try, they often can contain sensitive information that's not easily discernible by non-technical staff. This requires either removing that information at the time of writing, which means they will be less effective, or it means keeping a second set of redacted documents for external distribution. This is a lot of work by highly paid engineers that we believe should be spent writing software.
Since so much policy deals with infrastructure, these policies are themselves code, in-code comments, or CI/CD. These are not themselves easily understood without correct technical context.
We write our policies to deliver exceptional systems. This sometimes means actionable scraps of paper over well-written Word documents that are rarely used. In light of this, we assert that policies really aren't a great measure of future performance.
So you still want to distribute policies externally? Please follow this checklist.
Is distribution of a policy truly needed? Send this policy and politely inform the customer that we do not distribute our policies out of security concerns. We think most will appreciate the candor. Moreover, we trust our customers, and we hope they trust us. We can freely fill out checklists affirming existence of certain policies, and this should be sufficient.
Propose a conference call to audibly walk through the rough approach to the specific policy requests.
Ask the specific purpose of each requested policy. Find appropriate alternatives where possible, and constrain the use of the policy review.
Insist on a technical or subject matter expert for review of each policy.
Never distribute more than 1 policy per request. Mass-sending multiple policies indicates that they likely aren't being properly reviewed.
Remind customers of the confidential nature of our policies.
Request immediate and documented deletion, including from email inboxes, of each distributed policy after the stated purpose has been exhausted