The main agent only exposes 4 SurfSense tools (web_search, scrape_webpage,
update_memory, create_automation) and delegates connectors/MCP/deliverables
to subagents. Yet it built those 4 by importing and iterating the 900-line,
connector-laden shared BUILTIN_TOOLS via build_tools_async.
Introduce app/agents/multi_agent_chat/main_agent/tools/registry.py owning
just those 4 factories, and switch runtime/factory.py to build_main_agent_tools.
Binding order is preserved (scrape_webpage, web_search, create_automation,
update_memory) to match prior behavior exactly.
shared/tools/registry.py BUILTIN_TOOLS is intentionally unchanged: it remains
the app-wide tool *metadata* catalog used by action_log (revert/dedup
resolvers for subagent-executed connector tools) and the /agent/tools
listing endpoint.
Verified: full unit suite green (2431 passed, 1 skipped); import-all guard ok.