# subagentdescriptions.com — the Tool Description primitive

> A durable, D1-backed catalog of prompt-engineering best practices specific to writing Claude tool/function descriptions and schemas. A focused subset of, not a duplicate of, subagentprompts.com's 14 general prompting techniques.

## API
- GET /api/practices — list practice rows (category, description, good/bad examples)
- GET /api/practices/:id — a single practice row as JSON

## Family
This site is one of the Cloudflare Workers in the subagent*.com family. For the
live, machine-readable directory of every sibling domain, Cloudflare zone ID,
and worker binding, fetch:
https://subagentsubdomains.com/api/dns-zones

For a unified catalog of every API route across every primitive in the family:
https://subagentapi.com/api/catalog