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Two halves of the same failure, found debugging a marketplace connector that logged "connected — 6 tool(s)" while every call died on a missing module. The verify ran as a bare `sh -c` and inherited nothing, so a python connector was rejected by its own verify for a dependency installed one directory away — `global_enable` installs before it verifies, so the deps were provably there at the moment the check denied them, and the row ended up disabled. Only connectors that bother to declare a verify could hit it. `verify_env` now builds the verify's environment in one place and derives PYTHONPATH from the workdir, which is already the connector dir in both targets; `or_insert`, so a value the form declares still wins. The global branch of the reinstall refresh restarted the server without ever installing its deps: `ensure_installed_host` was reachable from `global_enable` alone, so a marketplace Update that adds a requirements.txt landed the file and brought the connector back exactly as broken. It now runs once per connector folder before the restart loop, best-effort. The per-user branch had always reinstalled, which is why nothing with scope=user ever showed the bug. Known gap, deliberate: POST /api/mcp/test shares run_verify but not the install, so testing a python connector never enabled on the box still fails on missing deps. Making a "try it" button write to disk for minutes is the worse trade.