Slack does the same thing:
> Get started using the Slack MCP server by setting up a connection with an available partner
https://slack.com/help/articles/48855576908307-Guide-to-Mode...
You can install the mcp by creating an api app without being a partner.
Another company desperately trying to enshittify their integrations as they realize AI agents are a mortal threat to their entire business.
You can run the Slack app in a container and let an agent control it. It's not elegant, but it works.