The advertised tool surface is frozen at initialize, so anything that
changes which plugin tools exist has to end the sessions built before it.
tools/list_changed is not an alternative: no event store is configured,
and the surface would not be re-read anyway.
Unconditional, no diffing. The surface is per-session, since it depends
on the caller's scopes and the plugin's grants, so there is no ctx-free
set to compare against.
Five routes, mirroring what admin.controller.ts already does for addons:
activate, deactivate, update, retrust and uninstall. activate(id,
consent), update and retrust are also the grant-change paths, so "on an
mcp:tools grant change" needs nothing extra. A failed call invalidates
nothing, because nothing changed.
The addon cascade needed its own call. Disabling an addon can stop a
plugin that publishes tools, and the addon doing the cascading is not
necessarily one of MCP_RELEVANT_ADDONS, so mcpAffected does not cover it.
Still gated on a plugin actually stopping, which keeps the #1414 rule
that a config-only save kills nothing.
Imported from sessionManager rather than the src/mcp barrel, which
evaluates readEnv().mcp at module scope.
MCPINV-001 to MCPINV-007.