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_READ_ONLY_TOOLS fails closed, which is the right design — but the list had gone stale, so a read-only key could get_note and not get_snippet, both pure reads of the same table, and could not read a design system at all. That inverts the sensitivity ordering: the free-text records were reachable and the structured, low-sensitivity ones were not. `find_duplicate_snippets` sitting in the list was the tell — someone classified the report and missed the getters beside it. Adds the twelve reads that were missing: snippets, processes, the six design system tools, and list_repo_bindings. Each verified to mutate nothing rather than assumed — this is a security boundary, and a wrong entry does not cost what a missing one costs. record_pulled on four getters is telemetry about the read, not a change to what was read, and get_note already carried it inside the boundary. The list stays explicit. Deriving it from the name would be worse than staleness: it makes the boundary follow a naming convention, so any future get_* grants itself access. list_starter_role_groups is the live illustration — it reads a constant, but names create_design_system in its docstring, so a pattern-matcher flags it. So derive the CANDIDATES and keep the DECISION explicit: a new test asserts every read-shaped tool appears in _READ_ONLY_TOOLS or in a declared _DELIBERATELY_WRITE_SCOPED, and that neither set names a tool that no longer exists. Adding a getter now forces a classification at review time instead of denying it silently. The second set is empty and stays declared — otherwise a future get_or_create_* would be pushed into the allow-list to make the test pass, which is the wrong way to satisfy it. Third instance of the same shape, after #2476 and #2444: a hand-written enumeration that missed the members added after it was written. Refs #2496