Your stack is not wrong. It is missing a layer.
Nothing to replace, nothing to reconfigure, nothing to migrate. Every layer you run does its job correctly, and stops at its own edge by design.
An agent crosses every one of those edges in a single question.
Each layer below is correct. None of them is failing. They were built when a human asked one system at a time, and each one draws its boundary where that assumption held.
Identity guards who comes in. Posture guards data at rest. Nothing authorizes data in motion across all of them at once, which is exactly how an agent works.
What each layer is for, and where its edge is.
Said the other way round, because a placement argument that only lists gaps reads as an attack on tools the reader chose.
Agent platforms
Run the agent and carry the conversation.
They trust the caller, because trusting the caller is what a platform is.
Identity
Establish who came through the door, and with what factor.
Authentication ends at the door. Nothing downstream re-asks on behalf of the person.
Data platforms
Enforce their own grants, correctly, every time.
They enforce for whichever identity presented itself, which is often the agent’s.
Data posture
Classify data where it sits, and tell you where the sensitive material is.
Classification describes data at rest. It cannot follow a fragment into an answer.
The categories we get mistaken for, and what we are instead.
| Category | What it does | Where we differ |
|---|---|---|
| Identity and access management | Who you are, and what you may sign in to. | We read what it knows and never replace it. |
| Data security posture management | Where sensitive data lives, at rest. | We act on data in motion, one query at a time. |
| DLP and CASB | Content leaving the boundary. | We decide before an answer is assembled, not after it moves. |
| Agent observability | What your agents did, in aggregate, afterwards. | We decide in the path. The record is a by-product, not the product. |
We sell authorization, not observability. The verb is decide.