I don't think you need to have more tools, having more applications that installed in your device means the more chance or vulnerability of getting hacked.
Having more applications installed on my device means the more chance of getting hacked. Though I'm New into the crypto space, I don't know but I've read somewhere that without someone having access to my secret code that is my passphrase he wouldn't be able to hack or get access to my wallet.
My question here is "Do you mean my wallet can be hacked even without the person getting access to my Passphrase"?
Someone can still hack your wallet if you connect your wallet to malicious website. They don't need your phrase anymore when you connect your wallet to these sites. So you have to be very careful with where you connect your wallet, if possible don't even connect your wallet to any app or website be it for airdrop or giveaway. So as you are protecting your seed phrase also avoid the urge of connecting your wallet to any third party site or App.