Add MVP resource tool rules

Docs/TechnicalDesignDocument.md

@@ -448,6 +448,16 @@ gone. Respawn timing is configurable per Blueprint through
 uses a server-side timer and restores replicated `RemainingHarvests` when the
 delay expires.
 
+Tool requirement rules remain inventory-based for the MVP because dedicated
+equipment slots are deferred. A resource node can declare `RequiredToolItemId`,
+`bAllowBareHandGathering`, and `ToolQuantityBonus`. Current Ground Zero wood,
+fiber, and stone nodes still allow bare-hand gathering so the first survival
+loop cannot deadlock before the player can craft a tool. When the player has a
+`basic_tool` in inventory, those nodes grant an extra unit per harvest. Edible
+plants remain pure bare-hand gathering. Later nodes can disable
+`bAllowBareHandGathering` when the game has proper tool equipment, durability,
+and feedback UI.
+
 ### Wildlife Navigation
 
 MVP wildlife movement is server authoritative. `AAgrarianWildlifeBase` uses an