# `dev.tsquare/tsquare` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/dev.tsquare/tsquare
- JSON: https://anlyon.dev/api/v1/servers/dev.tsquare/tsquare
- Version: 0.14.2 (active)
- Publisher: dev.tsquare (domain proven to the MCP Registry)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Repository: https://github.com/tsquare-js/tsquare
- Metadata from the official MCP Registry, synced 2026-11-04T01:17:44.570Z

Title and description, as the publisher wrote them:

```untrusted-server-text
tsquare wireframes
Draws UI wireframes from a small text language: multi-screen boards with notes and flow arrows.
```

Scanned 2026-11-04T01:18:05.386Z over streamable-http.

**3 tools: 3 change things.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 0 | ask |
| Changes things | write | 3 | ask |
| Only reads | read | 0 | allow |

## Exfil surface

No private-data -> untrusted-input -> outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.

| Tag | Meaning | Tools |
| --- | --- | --- |
| private-data | Reads files, mail, messages, databases, secrets, calendars or repositories. | none |
| untrusted-input | Brings in text someone else can write: web pages, inbound email, messages, issues and comments. | none |
| outbound | Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL. | none |

## Findings

- **warn** Annotations that disagree with the tool in `share_wireframe` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

```untrusted-server-text
The server marks "share_wireframe" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

annotations: {"readOnlyHint":true,"openWorldHint":false}; The description's first verb is "link": a word for a change.
```


## Changes things (3)

Creates or changes something that can be changed back. Claude Code: ask.

### `render_wireframe`

- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

Description, as the server wrote it:

```untrusted-server-text
Check tsquare wireframe text and render it. Returns a PNG of the board so you can see it, or the problems by line number (with the valid options) if the text isn't valid. Fix every problem and call it again.
```

### `share_wireframe`

- The description's first verb is "link": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
Links for valid tsquare wireframe text, the same kinds as the playground's Copy link menu: a share link to edit it in the playground, image links (SVG, PNG), Markdown and HTML. Ask only for the links the user needs (default: an SVG image link and the share link). Each link contains the whole wireframe text (compressed), so anyone with a link can read it.
```

### `wireframe_guide`

- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

Description, as the server wrote it:

```untrusted-server-text
How to write a tsquare wireframe: the text format, the rules, a worked example and every component with its props. Call it once before writing your first wireframe.
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `tsquare`:

```json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__tsquare__wireframe_guide",
      "mcp__tsquare__render_wireframe",
      "mcp__tsquare__share_wireframe"
    ],
    "deny": []
  }
}
```

## Remote posture

What an anonymous client saw at the remote endpoint, last 2026-11-04T02:19:22.620Z, unchanged since 2026-11-04T02:19:22.620Z. No credentials were sent and no tool was called. Values are shown as the endpoint returned them. Method: https://anlyon.dev/methodology#remote-posture

| Fact | Observed |
| --- | --- |
| Reachable | `yes` |
| HTTP status of an anonymous initialize | `200` |
| tools/list served without credentials | `yes` |
| Tools that change things, listed without credentials | `3` |
| Protocol version | `2025-06-18` |
| WWW-Authenticate on 401 | `not observed` |
| resource_metadata in WWW-Authenticate | `none` |
| RFC 9728 protected resource metadata | `none` |
| Authorization servers | `none` |
| Legacy HTTP+SSE transport | `no` |
| Dynamic client registration | `not observed` |
| Client ID metadata documents | `not observed` |

- **warn** Tools that change things, listed to anyone ([unauth-remote-writes](https://anlyon.dev/methodology#unauth-remote-writes))

```untrusted-server-text
The endpoint served tools/list without credentials, and the list has 3 tools that change things (3 write). Whether a call also works without credentials was not tested: tools are never called.

https://tsquare.dev/mcp: tools/list returned 3 tools to an anonymous client, including wireframe_guide (write), render_wireframe (write), share_wireframe (write)
```