MCP Tool Router with Jev and MCTS

Harness-router is a lightweight tool router that uses Jev for fast tool selection and Monte Carlo Tree Search for harder multi-step decisions. It uses MCP as the tool interface and falls back when routing is uncertain.

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Revolutionary_Sir140 in r/mcp@Revolutionary_Sir140

I built an MCP tool router using Jev + Monte Carlo Tree Search I’ve been working on harness-router, a lightweight router for tools. Instead of sending every tool definition through the LLM and asking it to decide, the router can use: Jev for fast tool selection Monte Carlo Tree Search (MCTS) for harder multi-step decisions MCP as the tool interface confidence-based fallback when routing is uncertain The goal is simple: fewer tokens and faster tool selection for coding/agent harnesses. Demo + docs:https://harness-router.vercel.app I’m currently working on proper MCP benchmarks comparing normal LLM tool calling vs routed decisions. Would love feedback from people building MCP agents—especially on what benchmarks would actually be useful.

Sep 26, 2026Reddit postsView on Reddit

The goal is to reduce tokens and speed up tool selection for coding and agent harnesses. The author is working on benchmarks comparing standard LLM tool calling with routed decisions.

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