Comment by csemple

I appreciate the feedback. Let me address the key technical point:

On enforcement mechanism: You've misunderstood what the system does. It's not asking the LLM to determine security.

The Capacity Gate physically removes tools before the LLM sees them:

    user_permissions = ledger.get_effective_permissions()
    allowed_tools = [t for t in tools if (user_permissions & t['x-rosetta-capacity']) == t['x-rosetta-capacity']]

If READ_ONLY is active, sql_execute gets filtered out. The LLM can't see or call tools that don't make it into allowed_tools.

    response = client.messages.create(tools=allowed_tools)

This isn't RBAC checking after the fact. It's capability control before reasoning begins. The LLM doesn't decide permissions—the system decides what verbs exist in the LLM's vocabulary.

On Ring 0/1: These are enforced at the application layer via the Capacity Gate. The rings define who can change constraints, not how they're enforced.

On MCP: MCP handles who you are. This pattern handles what you can do based on persistent organizational policies. They're complementary.

The contribution isn't "LLMs can do RBAC" (they can't). It's "here's a pattern for making authority constraints persistent and mechanically enforceable through tool filtering."

Does this clarify the enforcement mechanism?