Couplet 6

6aYour agents call tools over MCP.Result: gateway per call for mcp 6bYou are a small team and want to start free this week.Result: free start

In short: with several identity providers, no single vendor's native agent features cover everyone. The deciding question is how agents reach tools. If they call tools over MCP, a gateway that checks each call is the common answer. If budget and time are tight, start on a free tier.