November 24, 2025
Too many tools, not enough context?
Claude Advanced Tool Use
Claude’s new power trio: smarter tools, fewer headaches — devs split on the hype
TLDR: Anthropic launched Tool Search, code-based tool calling, and examples so Claude can use many apps without overload. Devs cheered token savings but split between excitement and “tool-on-tool” fatigue, joking we’re stuck in a complexity-versus-simplicity loop—important as AI agents scale without melting their brains.
Anthropic dropped a power-up for Claude, promising AI helpers that can juggle tons of apps without frying their memory. The trio — Tool Search, Programmatic Tool Calling, and Tool Use Examples — lets Claude discover tools on the fly, run calls in code, and learn from real examples. They claim an 85% cut in context bloat (from ~77K tokens to ~8.7K) and showed Claude editing huge spreadsheets without slowing down. Accuracy reportedly improves too when Claude stops loading every tool up front. Read the post.
Then the comments lit up. tfirst says we’re stuck in a complexity → simplicity → complexity loop. postalrat joked it’s “tools for tools,” while cube2222 cheered code-first calls as the move devs wanted. behnamoh couldn’t believe people ever loaded every JSON schema. Meanwhile vessenes asked how to actually add a tool. The split: smart engineering that saves tokens vs. yet another layer of scaffolding. The vibe is equal parts relief, skepticism, and memes.
Key Points
- •Anthropic released three Claude features: Tool Search Tool, Programmatic Tool Calling, and Tool Use Examples.
- •On-demand tool discovery reduces context from tens of thousands of tokens to roughly 8.7K in a sample setup, preserving about 95% of the context window and yielding an 85% token reduction.
- •Preloading MCP tool definitions across common servers can exceed 100K tokens; Anthropic observed up to 134K tokens before optimization.
- •Internal testing showed MCP evaluation accuracy improved: Opus 4 from 49% to 74% and Opus 4.5 from 79.5% to 88.1% with Tool Search Tool.
- •Claude for Excel demonstrates Programmatic Tool Calling to process large spreadsheets without overloading context.