I slightly disagree with Faust on how philosophy is about language - A philosophical act was when Ape spoke the first deliberate reference to an object that wasn’t a fellow ape, gave birth to some objective realm, a metaphysics which drew the apes energy into his brain like a tree soaks up water with negative pressure from its crown, and erected ape and made this cosmos appear, as Stanley Kubrick visioned it. The cosmic wheel which the ape begins to propel after he raises a stick to a larger stick and begins to literally “beat down” - hammer - the first metaphysical act.
Philosophy is the active aspect of the human mind, that which engineers appearances before they manifest, for example that which produces syntactic solutions.
To use the tool because of the power of the tool is to begin the journey, the tools create the job so to speak, power engenders goals, but it is hard to keep these goals under control - that is a power mankind has not yet attained. Nietzsche produced the the Superman idea, but I find this to be too anthropocentric as a goal. So to me not language as such but its touching Earth are ultimately the criteria for sound philosophy; can you touch it. Does it ‘make sense’. Kant doesn’t, Machiavelli does. Rules are usually either iron or very cheap plastic.