Tool Scoping · Per-Agent Tool Binding (Least-Privilege Discipline) Overlay posture: the base frameworks ([[crewai]], LangChain, LangGraph) all define tools and bind them, but treat scoping as a one-line "assign tools to the agent that needs them" footnote. This overlay makes the rubric first-class. Non-trivial claims cite inline against . The lever the base skills under-surface: tool definition and tool binding are two separate decisions. You define a tool once (reusable class/function), but you bind it per-agent deliberately. The [[crewai]] SKILL states this in one clause — "tool 定义可复用；但每个 a…