Agent Tool Routing

Overview

Past ~15 tools, the LLM's tool-selection accuracy collapses. The fix is a router layer: discover capabilities, narrow the tool set per turn, then hand a small focused set to the LLM. This skill builds that router.

When to use

• Agent has 20+ tools and picks the wrong one
• Multiple MCP servers — too many overlapping tools
• Tools come and go at runtime (per-tenant, per-permission)
• Need fallback chains (preferred tool → cheaper tool → cached)
• Cost: every unused tool description wastes input tokens

Architecture