# `xyz.revunda/app-complaints` 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/xyz.revunda/app-complaints
- JSON: https://anlyon.dev/api/v1/servers/xyz.revunda/app-complaints
- Version: 1.0.0 (active)
- Publisher: xyz.revunda (domain proven to the MCP Registry)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Metadata from the official MCP Registry, synced 2026-10-31T17:18:59.712Z

Title and description, as the publisher wrote them:

```untrusted-server-text
Revunda: app review complaints
Top complaint themes in 1-star reviews of 531 App Store, Google Play and Shopify apps. Read-only.
```

Scanned 2026-10-31T17:19:06.951Z over streamable-http.

**4 tools: 2 change things and 2 only read.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 0 | ask |
| Changes things | write | 2 | ask |
| Only reads | read | 2 | allow |

## Exfil surface

No private-data -> untrusted-input -> outbound path in this server alone: no tool is tagged private-data 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. | `mcp__app-complaints__get_app_complaints` |
| 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 `estimate_one_star_cost` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

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

annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "estimate_one_star_cost" says "star": a word for a change.
```


## Changes things (2)

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

### `estimate_one_star_cost`

- The name "estimate_one_star_cost" says "star": 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
Same maths as Revunda's 1-star review cost calculator: estimated 1-star reviews per month by complaint theme (sector shares from the 29,785-review study), money exposure if you give a cost per 1-star, 5-star ratings that offset one 1-star, and 5-star ratings needed to reach a target rating. Sectors: parcels, telecom, taxi, energy, news, betting, travel, streaming, insurance, smarthome, banks, shopping, food, health, other.
```

### `what_users_complain_about`

- 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 often a complaint theme appears in 1-star reviews overall and by sector, and which apps get it most. App stores themes: login (Login & account access), crash (Crashes & won’t open), slow (Slow, loading & lag), update (Broke after an update), support (Customer service), billing (Charges, fees & refunds), payment (Payment or checkout fails), ux (Redesign & confusing UI), ads (Ads), notif (Notifications & alerts). Shopify App Store themes (market='shopify'): support (Slow or no support), bugs (Bugs & broke the store), billing (Charges & refunds), after_uninstall (Charged after uninstalling/cancelling), price_change (Price increases & plan changes), missing (Missing features & limits), slow (Slow store & app speed), leftover (Code left after uninstall), scam (Called it a scam or misleading), expensive (Too expensive for what it does), hard (Hard to use or set up), lockin (Export, import & migration pain), sync (Sync, orders & inventory errors). Omit theme to get the ranking of all themes.
```

## Only reads (2)

Looks things up and changes nothing. Claude Code: allow.

### `get_app_complaints`

- The name "get_app_complaints" says "get": a word for reading.
- Tag untrusted-input: The description's first sentence says "review": it reads comments, which other people can write.

Description, as the server wrote it:

```untrusted-server-text
Top complaint themes in an app's low-star reviews, with real counts and shares from Revunda's studies, plus a link to the app's Revunda page. Pass an app name (e.g. 'AccuWeather'), an App Store URL or numeric id, a Google Play URL or package name (e.g. 'com.commbank.netbank'), or a Shopify App Store URL or handle (e.g. 'judgeme'). If the app is not covered, returns covered:false and a link to Revunda's free check for any app.
```

### `list_covered_apps`

- The name "list_covered_apps" says "list": a word for reading.

Description, as the server wrote it:

```untrusted-server-text
List or search the apps that have complaint data in Revunda's studies. Filter by store, by sector/category (e.g. 'Banks & payments', 'Product reviews') or by a name search. Returns name, store, sample size, top complaint and link.
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `app-complaints`:

```json
{
  "permissions": {
    "allow": [
      "mcp__app-complaints__get_app_complaints",
      "mcp__app-complaints__list_covered_apps"
    ],
    "ask": [
      "mcp__app-complaints__what_users_complain_about",
      "mcp__app-complaints__estimate_one_star_cost"
    ],
    "deny": []
  }
}
```

Capability tags behind the rules (a read tagged outbound is asked about):

- `mcp__app-complaints__get_app_complaints`: untrusted-input