PickSkill

Each tool targets a distinguishable object: earnings/fundamentals, saved portfolios, and per-symbol technical signals. The main overlap is that get_my_portfolio already returns the same 8 indicator signals that get_stock_signals provides, so an agent could occasionally pick the portfolio tool when it just wants signals for arbitrary tickers — but the descriptions make the portfolio-vs-arbitrary-list boundary clear.

All three tools follow the identical get_<noun_phrase> snake_case pattern (get_earnings_highlights, get_my_portfolio, get_stock_signals). The verb is consistent and the nouns are descriptive of the returned resource.

Three focused tools is a reasonable, well-scoped surface for a read-only stock research skill and avoids bloat. It leans slightly thin — there is no symbol lookup/screening or quote-overview tool to complement the three analytical calls.

Core read paths are covered (portfolio read, technical signals, earnings/fundamentals), but notable operations are absent: no stock search/lookup by name, no price history, no news/company profile, and no portfolio creation or editing (read-only only). Agents with a symbol in hand can work, but general research workflows will hit dead ends.