# `io.github.Notysoty/simplyutils-mcp` 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/io.github.Notysoty/simplyutils-mcp
- JSON: https://anlyon.dev/api/v1/servers/io.github.Notysoty/simplyutils-mcp
- Version: 1.0.2 (active)
- Publisher: io.github.Notysoty (GitHub account)
- Runs: remote (streamable-http), local (npm)
- Sign-in to list tools: none
- Repository: https://github.com/Notysoty/simplyutils-mcp
- Metadata from the official MCP Registry, synced 2026-10-27T11:33:06.635Z

Title and description, as the publisher wrote them:

```untrusted-server-text
SimplyUtils
Developer and text tools: JSON, QR codes, units, passwords, UUIDs, hashes, Base64, regex and more.
```

Scanned 2026-10-27T11:33:24.958Z over streamable-http.

**10 tools: 1 do something that can't be undone, 7 change things and 2 only read.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 1 | ask |
| Changes things | write | 7 | 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 untrusted-input.

| 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. | `mcp__simplyutils__convert_units` |

## Findings

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


## Can't be undone (1)

Sends, pays, publishes or merges: once done, it cannot be taken back. Claude Code: ask.

### `convert_units`

- The name "convert_units" says "convert": a word for a change.
- The input addresses people (input.to): what it sends cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Tag outbound: The input takes a destination (input.to): what the tool writes goes there.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
Convert a number between two units of the same category and return a line such as "5 mi = 8.04672 km" (up to 10 significant digits). Units are matched by symbol or name, case-insensitive. Errors are returned for unknown units, units from another category, non-numeric values and temperatures below absolute zero. Months are 1/12 of a 365-day year. Units by category (symbols): length: m, km, mi, ft, in, cm, mm, yd, nmi; weight: kg, g, lb, oz, t, mg, st; temperature: °C, °F, K; volume: L, mL, gal, fl oz, cup, tbsp, m³; speed: km/h, mph, m/s, kn, ft/s; area: m², km², mi², ft², ac, ha; data: B, KB, MB, GB, TB, bit, KiB, MiB, GiB, TiB; time: s, min, h, d, wk, mo, yr, ms.
```

## Changes things (7)

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

### `base64`

- 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
Encode text (as UTF-8) to Base64, or decode Base64 back to text, and return the result. Decoding accepts standard and URL-safe alphabets and ignores whitespace; invalid Base64 returns an error. Bytes that are not valid UTF-8 are shown as replacement characters. Input up to 100 KB.
```

### `convert_timestamp`

- The name "convert_timestamp" says "convert": 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
Convert a Unix timestamp or a date to Unix seconds, Unix milliseconds, ISO 8601 (UTC), an HTTP-style UTC string and a readable date in the chosen time zone. Numbers with 13 or more digits are read as milliseconds, shorter ones as seconds. Dates without a time zone are read as UTC. Errors are returned for unreadable dates and unknown time zones.
```

### `generate_password`

- The name "generate_password" says "generate": 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
Generate random passwords with Node's cryptographically secure generator. Each enabled character set appears at least once and the result is shuffled. Returns one password per line; every call gives new results. An error is returned if all character sets are turned off. Passwords are not stored or logged.
```

### `generate_qr_code`

- The name "generate_qr_code" says "generate": 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
Make a static QR code for a link or any text, up to 800 UTF-8 bytes. Returns a 512 px PNG image plus the SVG markup. The data is stored in the code itself, so it never expires and needs no account. Light-on-dark colors are allowed, but some older scanners need dark on light. Errors are returned for empty text, content over 800 bytes, or colors that are not six-digit hex.
```

### `generate_uuid`

- The name "generate_uuid" says "generate": 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
Generate random version 4 UUIDs (RFC 9562) in lowercase 8-4-4-4-12 form, one per line. Every call gives new values.
```

### `hash_text`

- 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
Hash text (encoded as UTF-8) and return a line such as 'sha256: ba78...' with the lowercase hex digest. The same input always gives the same hash. MD5 and SHA-1 are only for checksums, not security; do not use plain hashes to store passwords. Input up to 100 KB.
```

### `test_regex`

- The description's first verb is "run": 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
Run a JavaScript (ECMAScript) regular expression against text. Returns the match count and, for each match, the matched text, its 0-based index, numbered capture groups and named groups. Returns 'No matches.' when nothing matches. All matches are listed (the g flag is added automatically), up to 200. Invalid patterns or flags return an error explaining why; patterns that run longer than 0.5 seconds are stopped with an error. Text up to 100 KB.
```

## Only reads (2)

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

### `count_words`

- The name "count_words" says "count": a word for reading.

Description, as the server wrote it:

```untrusted-server-text
Count words, characters (with and without spaces), sentences and paragraphs, and estimate reading time at 238 words per minute. Words are runs of letters or digits in any language; hyphenated words and contractions count once. Paragraphs are separated by blank lines. Input up to 100 KB.
```

### `format_json`

- The description's first verb is "validate": a word for reading.

Description, as the server wrote it:

```untrusted-server-text
Validate JSON and return it pretty-printed or minified, optionally with object keys sorted A-Z (recursively; array order is kept). Returns the formatted JSON as text. Invalid JSON returns an error naming the problem and its position. Input up to 100 KB.
```

## Claude Code permissions

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

```json
{
  "permissions": {
    "allow": [
      "mcp__simplyutils__format_json",
      "mcp__simplyutils__count_words"
    ],
    "ask": [
      "mcp__simplyutils__generate_qr_code",
      "mcp__simplyutils__convert_units",
      "mcp__simplyutils__generate_password",
      "mcp__simplyutils__generate_uuid",
      "mcp__simplyutils__hash_text",
      "mcp__simplyutils__base64",
      "mcp__simplyutils__test_regex",
      "mcp__simplyutils__convert_timestamp"
    ],
    "deny": []
  }
}
```

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

- `mcp__simplyutils__convert_units`: outbound