Terms and privacy
A pool holds what you put in it, for as long as its retention says, readable by whoever you gave a key to. That is the whole policy; the rest is detail.
Retention
Observations older than the pool's retention window are deleted by a sweep. Deleting a pool deletes its sources and observations at once.
Keys
A key's plaintext is shown once and never stored; only a hash is. Revoking a key drops any socket holding it at its next frame.
Public pools
A public pool is readable by anyone on the internet without a key. Making one public is your act, and a warning says so before you do.