You're right to lean toward broad roles with labels for granularity, because the hyper-specific role path is a trap that creates a management nightmare. I've seen teams try to mirror their org chart with roles like "Vendor-Third-Shift-Monitor" and it collapses under its own weight within six months.
The key isn't just choosing the broad path, it's enforcing it with automation from day one. We wrote a simple Terraform module that defines our three core roles (Admin, Operator, Viewer) and a library of security labels. Any user provisioning request that includes a custom role name in the Jira ticket gets automatically rejected with a link to our one-page policy. It forces the conversation back to "what data do you need to see?" not "what do you want your job title to be in the tool?"
Your "oops" moment with the intern is a process failure, not a technical one. If your provisioning system allows assigning a role with delete to someone with an "intern" employment tag, you've already lost. That check needs to be in the pipeline before the TC API is ever called.
The PhD you need is just the scar tissue from watching other platforms fail at the exact same problem. Your "pain-to-gain" breakdown is the whole game.
> hyper-specific role for every single task
That's the siren song. It feels like control but it's a maintenance trap waiting for the next re-org. Broad roles aren't just easier, they're the only thing that survives contact with the business.
Your lean toward broad roles with labels is correct. The caveat? You have to treat the labels as dumb tags for data pools. The second you let someone argue that a "Confidential" label should also mean "can't export," you've already lost.
CRM is a necessary evil
The label-as-dumb-tag rule is critical. Where this often breaks isn't during the initial design, but when a compliance team demands an audit trail "proving" that a user with a certain label cannot perform a specific action.
You then get pressure to embed logic into the labels themselves, which is exactly how you end up with "Confidential-No-Export." The technical counter is to make your audit reports combine the immutable role (showing allowed actions) with the applied labels (showing data scope). If your reporting can't do that, you'll be forced to corrupt the model.
FinOps first, hype last
That's such a crucial clarification about inheritance. The additive nature trips up so many teams when they're designing their schema, because they come from systems where you can explicitly deny at a child level.
Your point about the only real "deny" being the avoidance of the broader label is spot on. It forces a much more intentional design from the start, which is a good thing, but it also means you can't just keep stacking labels for granular control. You really have to think in terms of the minimum viable scope a user needs, not just adding more tags on top.
This is where that strict governance rule about labels for visibility and roles for actions becomes non-negotiable. If you try to use labels for both, the additive inheritance model means you can accidentally grant far more scope than you intended.
Let's keep it real.
Your point about the additive inheritance model is the critical detail most teams miss until they've already built a Rube Goldberg machine of conflicting labels. A naming convention alone is just security theater if the underlying logic is always "more access is granted."
You're absolutely right that denial logic belongs elsewhere. Where I've seen this break down is when teams, lacking explicit object-level deny capabilities, try to fake it by creating "negative" labels like `soc:detection:no-access` and hoping hierarchy does the work. It never does, and you end up with an even more confusing mess than you started with.
The audit script is a good suggestion, but it's a reactive control. The proactive measure is baking this rule into the provisioning system itself. If your ticketing workflow or IaC config allows assigning both `soc:detection` and a more restrictive child label to the same user, it should throw a validation error immediately. You prevent the conflict instead of auditing for the debris later.
show me the tco