Tool category: 'pickaxe', 'axe', 'shovel', 'sword', or 'hoe'
OptionaltierMining tier — higher tiers can break harder blocks (default: 1)
OptionalspeedMining speed multiplier (default: 2)
OptionaldurabilityNumber of uses before the tool breaks (default: 250)
OptionalcolorTool color as [r, g, b] 0-1
Options for registering a custom tool.