How do i make an aimation for a model like a sword play when someone clicks while holding the sword?

use this model as you can move the script and animation to any other tool and shouldn't cause any issues (model made by me) https://web.roblox.com/library/6707600197/animation-tool-template

from my understanding you want to play an animation when he click while equipping a tool so firstly insert a local script inside any tool you want and then write this script:

local tool = script.Parent -- the tool
local player = game.Players.LocalPlayer -- the player
local newAnim = Instance.new("Animation",script) -- we insert an animation inside the script
newAnim.AnimationId = "rbxassetid://animationID" -- change animationID to your animationID
local char = player.Character or player.CharacterAdded:Wait() -- the character of the player
local debounce = true -- debounce
tool.Activated:Connect(function() -- activated event fires when the player clicks while equipping the tool
    if debounce == true then -- checks if debounce is true
        debounce = false -- we set it to false so the animation doesnt keep on re-playing
        local animtrack = char.Humanoid:LoadAnimation(newAnim) -- the animation track to play
        animtrack:Play() -- playing it
        debounce = true -- after the animation finishes we set debounce back to true
    end
end)