# 國際橋牌社

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 4 of 5 capability checks passed.

- host: vip.islandnation.tw
- url: https://vip.islandnation.tw/
- category: video courses
- type: media
- country: TW
- locations: Taiwan
- language: zh

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 4 of 5 checks passed.

- PASS — Markdown negotiation
- fail — Markdown twin at a predictable URL
- PASS — llms.txt
- PASS — API catalog
- PASS — MCP server answers

MCP tools (from tools/list on 2026-08-23): get_platform_info, search_courses, search_posts, get_course_details, get_post_details, get_event_details, get_lecturer_profile

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **buy** — "所有作品一次購足" → `https://vip.islandnation.tw/courses/all-in-3`

## Summary

國際橋牌社 offers video courses and documentaries on Taiwan's democratization and historical events.

## Context

555 sites in this index share the type "media"; 86 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark