As part of SDK-move readiness (#4411) , we'll want to rationalize what's accumulated in tool/. Some bits are stale and should just go away. Other bits that could be useful require package:github which is unlikely to find it's way into the SDK DEPS and so will need to find a new home.

• remove stale tool code #59172
• isolate package:github dependent code (and identify a new home) #59173