# ToolRank

> ToolRank is the first ATO (Agent Tool Optimization) platform. It scores, optimizes, and monitors how AI agents discover and select MCP tools. ToolRank Score is a 0-100 metric measuring agent-readiness across four dimensions: Findability, Clarity, Precision, and Efficiency.

## What is ATO?

ATO (Agent Tool Optimization) is the practice of optimizing tools, APIs, and services so AI agents can autonomously discover, select, and execute them. ATO differs from SEO (optimizing for search engines) and LLMO (optimizing for LLM citations) because it targets autonomous agent selection, not human-mediated discovery. LLMO is Stage 1 of ATO.

## ATO Framework

The ATO framework has three stages and four dimensions:

### Three Stages
- Stage 1: Be recognized (LLMO territory — AI-readable docs, llms.txt, structured data)
- Stage 2: Be selected (ATO-specific — MCP tool quality, API design, registry presence)
- Stage 3: Be used reliably (execution success rate, response quality, error handling)

### Four Dimensions (ToolRank Score)
- Findability (25%): Registry presence, tags, llms.txt, LLM training data inclusion
- Clarity (35%): Description quality, purpose statement, usage context, return descriptions
- Precision (25%): Schema types, enums, defaults, required fields, error handling
- Efficiency (15%): Token cost, tool count, modularity, execution speed

## Key Resources

- [ToolRank Score Tool](https://toolrank.dev/score): Free tool definition scoring
- [ATO Framework Guide](https://toolrank.dev/framework): Complete ATO methodology
- [Scoring Logic (Open Source)](https://toolrank.dev/docs/scoring): How ToolRank Score is calculated
- [API Documentation](https://toolrank.dev/docs/api): REST API reference
- [MCP Server Docs](https://toolrank.dev/docs/mcp): ToolRank MCP Server usage
- [Blog](https://toolrank.dev/blog): ATO insights and ecosystem analysis
- [Ecosystem Ranking](https://toolrank.dev/ranking): MCP server quality rankings

## Optional

- [GitHub Repository](https://github.com/imhiroki/toolrank): Open source scoring engine
- [ATO Manifesto](https://toolrank.dev/blog/ato-manifesto): Why ATO matters