Is the Zovo Nonogram Maker MCP server safe?

No scan can promise that. What its definitions show: 1 tool, 1 of which can change, send or delete something, and 1 finding from fixed checks. Allow the reads, ask before each change, and deny the deletes; the permissions block on this page does that.

Can the Zovo Nonogram Maker MCP server delete data?

No tool is classed as destructive: going by their definitions, none of them deletes, cancels or revokes anything.

Can the Zovo Nonogram Maker MCP server do things that cannot be undone?

No tool is classed as irreversible: none of them sends, pays, publishes or merges, going by their definitions.

What tools does the Zovo Nonogram Maker MCP server have?

1 tool: 1 write. generate_nonograms.

Does the Zovo Nonogram Maker MCP server need sign-in or OAuth?

Its remote endpoint listed its tools to an anonymous client, without sign-in.

Does the Zovo Nonogram Maker MCP server send data to outside services?

None of its tools sends, posts or publishes, or takes a recipient, channel or URL.

Has the Zovo Nonogram Maker MCP server changed its tools?

Not since anlyon.dev started tracking it. Last scanned Nov 8, 2026.

Zovo Nonogram Maker MCP server

io.github.theluckystrike/nonogram-makertheluckystrikestreamable-httpv1.0.0Scanned 7 days ago

Make printable nonogram puzzles for teachers, students and puzzle fans as a PDF with an answer key.

1 tool: 1 change things.

Reads private data · 0
Reads text others write · 0
Can send data out · 0
1 finding

Tools listed without sign-in. Remote posture

With Anlyon

1 tool here changes things. Govern it.

Anlyon lists the tools and adopts none.
Each tool you adopt gets approvals and receipts.
Your agent never holds the key.

Govern this server →

A tool your agent calls directly is not routed through Anlyon and is not governed by it. anlyon.dev only lists and labels, and these labels are the same either way.

What the Zovo Nonogram Maker MCP server can do

The Zovo Nonogram Maker MCP server is published by the GitHub account theluckystrike. It has 1 tool. It can create or change data (1 tool: generate_nonograms), but cannot delete data. None of its tools only reads.

None of its tools reads private data, brings in text other people write, or sends data out.

The fixed checks matched 1 finding (annotation-conflict). Each one comes with the text it matched.

Its remote endpoint lists its tools without sign-in.

Last scanned Nov 8, 2026, version 1.0.0.

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

1 tool

Changes things 1Creates or changes something that can be changed back.Claude Code: ask

generate_nonogramsUse this when the user wants printable nonogram puzzles (griddlers, hanjie, paint by numbers logic puzzles, pixel puzzles) as a PDF with an answer key: "make a nonogram", "nonogram…1 finding
Why it is in this group
- The name "generate_nonograms" says "generate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "generate_nonograms" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "generate_nonograms" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
Use this when the user wants printable nonogram puzzles (griddlers, hanjie, paint by numbers logic puzzles, pixel puzzles) as a PDF with an answer key: "make a nonogram", "nonogram generator", "turn this pixel art into a nonogram", "printable nonograms for my class". Put one object per puzzle in puzzles[]: shape (a built-in picture such as heart, cat, rocket), text (a word up to 8 letters), grid (the user's own rows, # filled, . empty, up to 25 x 25), or difficulty/size for a random grid; for a set of random puzzles use count with difficulty. A line solver checks that each puzzle has one solution; when a picture's clues allow several, fix decides: hints (default, print starter cells), change (flip a few cells) or refuse (error listing the unclear rows). Layout: per_page 1, 2 or 4, Letter or A4, title, name line, answer pages. Does not make colour nonograms, read photos or image files, or solve a puzzle from a photo.
Annotations the server declares
- title: Generate printable nonograms
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
- idempotentHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

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

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Nov 8, 2026, 06:22 UTC, unchanged since Nov 8, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 1
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: not observed
RFC 9728 protected resource metadata: not observed
Authorization servers: not observed
Legacy HTTP+SSE transport: no
Dynamic client registration: not observed
Client ID metadata documents: not observed

WarnThe whole server
The endpoint served tools/list without credentials, and the list has 1 tool that changes things (1 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://nonogram-maker.zovo.one/mcp: tools/list returned 1 tool to an anonymous client, including generate_nonograms (write)
What this check looks for

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warngenerate_nonograms
The server marks "generate_nonograms" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "generate_nonograms" says "generate": a word for a change.
What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http nonogram-maker https://nonogram-maker.zovo.one/mcp

claude mcp add --transport http nonogram-maker https://nonogram-maker.zovo.one/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__nonogram-maker__generate_nonograms"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as nonogram-maker. Review it before you use it.

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.github.theluckystrike/nonogram-maker/verify?hash=3f140994d7be28360d429d17ba5a05db96724a55857a0cd14c5fa4a897f08bb2" | jq -e '.changed == false'

Pinned hash 3f140994d7be, from Nov 8, 2026, 02:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.theluckystrike/nonogram-maker/changes.xml

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Badge

[![anlyon.dev](https://anlyon.dev/badge/io.github.theluckystrike/nonogram-maker.svg)](https://anlyon.dev/servers/io.github.theluckystrike/nonogram-maker)

Source: MCP Registry. Synced Nov 8, 2026, 03:18 UTC.