agent-tool-routing skillA
agent-tool-routing is agent-read markdown (skill) from akillness/jeo-skills: Tool registry, capability discovery, schema-first routing, router policies and fallbacks. Use when an agent has more than ~15 tools, multiple MCP servers, or needs dynamic tool selection based on context..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# 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
```
Request → [Capability Discovery] → [Router] → [Top-K Tools] → LLM
↑ ↑
registry index semantic + policy
```
## Tool registry
```python
@dataclass
class ToolEntry:
name: str
description: str # LLM-facing
schema: dict # JSON Schema
embedding: list[float] # for semantic match
tags: set[str] # billing, read, write, hitl
cost_usd_per_call: float
p95_latency_ms: int
requires_scopes: set[str]
fallback: str | None # tool name to try if this fails
```
…Read the whole file at its exact version.
How to install
mdr add akillness/jeo-skills/agent-tool-routing@git:20260920.2a2b733mdr add akillness/jeo-skills/agent-tool-routing@sha256:bdbe4fe3991bc5f7Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_4bytt67tfgtqrpmg)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260920.2a2b733 latest | 2026-09-20 | 2a2b733 | 3,828 B | A | view · diff |
| git:20260919.9f2a908 | 2026-09-19 | 9f2a908 | 3,834 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3828 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
akillness/jeo-skills · 47 stars · license none · pushed 2026-09-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4bytt67tfgtqrpmg GET https://markdownregistry.com/api/v1/resolve?ref=akillness/jeo-skills/agent-tool-routing GET https://markdownregistry.com/api/v1/blob/bdbe4fe3991bc5f7eba9d77ea6a7aee8ee6d49ed59e65f35b0f13275114c14a7
Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.