fix(tool-search): never defer Omnio's own product tools

[ppazosp]

Problem

The tiered-disclosure change (upstream 0986ac393) activates the tool_search bridge whenever any deferrable tool exists. Omnia's six plugin tools are deferrable, so they all end up behind tool_search / tool_describe / tool_call.

That breaks a contract the rest of the system already relies on: the agent's operating docs (SOUL.md, AGENTS.md) and the shipped skills name those tools directly. A deferred tool reads to the model as unavailable, so it substitutes a weaker built-in rather than searching for the one it was told to use.

Observed live, in production: the agent wanted web_read, reported it as "not directly available — it's a deferred tool under omnio-web", and fell back to web_extract.

Change

Extend only the never-defer set tool_search consults, via a dedicated _OMNIO_ALWAYS_LOAD_TOOLS frozenset unioned into _core_tool_names().

_HERMES_CORE_TOOLS is deliberately left untouched — it doubles as the tools: payload for the hermes-cli / cron / telegram toolsets, so widening it would change what those surfaces load. The two concerns share a name today but not a purpose; this keeps them separate.

Scope

Two files, +83/-2. No behaviour change for any non-Omnio surface: the always-load set is empty of anything those toolsets consult.

Testing

tests/tools/test_tool_search.py	57 passed (5 new)
tests/hermes_cli/test_tools_config.py	131 passed
tests/cron/test_scheduler.py	239 passed
tests/test_model_tools.py	32 passed
ruff check	clean

The three non-tool_search files are the other consumers of _core_tool_names / _HERMES_CORE_TOOLS, run to confirm the toolset payloads are unmoved.

Backward compatibility

Backward compatible.

Mixed-version pairing checked: Omnia ships via Vercel, the Hermes fork ships via sprite reprovision, independently. This change lives entirely inside the sandbox's Hermes — it alters which tools are presented to the model in a single turn, and touches no wire format, no persisted state, and no schema.

• New Hermes / old Omnia — the six tools load eagerly instead of deferred. Old Omnia neither knows nor cares which disclosure tier a tool sat in.
• Old Hermes / new Omnia — unchanged from today; the tools stay deferred and the agent keeps substituting. That is the bug, not a break.
• Persisted replay — no tool-call transcript changes shape. A tool_search-mediated call and a direct call serialise identically.

Rollout is a plain reprovision, no ordering constraint against Omnia.

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