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[–] 3 points 4 hours ago

Yeah, I recently attended a session at a conference where they were discussing the challenges with MCP, and with RBAC for AI more generally.

Two things stand out to me:

  1. MCP helps mediate the side-effects the agent requests, which is great… but it needs to return information to the agent, and if you can manipulate the content of the response then the MCP just becomes another vector for prompt injection.
  2. RBAC generally covers a matrix of actions + resources, but it can be hard to preconfigure resource identities because the agent can invent identifiers on the fly. It can’t modify the firewall on a named resource? Okay, it can make a new one with more lax permissions, and move existing infra over to the new one!
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