Is the UK Data: Secure generators MCP server safe?

No scan can promise that. What its definitions show: 6 tools, 6 of which can change, send or delete something, and 6 findings from fixed checks. Allow the reads, ask before each change, and deny the deletes; the permissions block on this page does that.

Can the UK Data: Secure generators MCP server delete data?

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

Can the UK Data: Secure generators 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 UK Data: Secure generators MCP server have?

6 tools: 6 write. draw_cards, generate_random_color, generate_password, generate_random_number, generate_username and generate_random_string.

Does the UK Data: Secure generators MCP server need sign-in or OAuth?

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

Does the UK Data: Secure generators MCP server send data to outside services?

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

Has the UK Data: Secure generators MCP server changed its tools?

Not since anlyon.dev started tracking it. Last scanned Nov 7, 2026.

UK Data: Secure generators MCP server

uk.co.reliness/generatorsreliness.co.ukstreamable-httpv1.5.0Scanned 8 days ago

Passwords, random numbers and strings, colours, usernames and card draws from a secure random source

6 tools: 6 change things.

Reads private data · 0
Reads text others write · 6
Can send data out · 0
6 findings

Tools listed without sign-in. Remote posture

With Anlyon

6 tools here change things. Govern them.

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 UK Data: Secure generators MCP server can do

The UK Data: Secure generators MCP server is published by reliness.co.uk, a domain the MCP Registry verified. It has 6 tools. It can create or change data (6 tools: draw_cards, generate_random_color, generate_password, generate_random_number and 2 more), but cannot delete data. None of its tools only reads.

6 tools bring in text other people can write (draw_cards, generate_random_color, generate_password and 3 more).

The fixed checks matched 6 findings (annotation-conflict and base64-blob). Each one comes with the text it matched.

Its remote endpoint lists its tools without sign-in.

Last scanned Nov 7, 2026, version 1.5.0.

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.

6 tools

Changes things 6Creates or changes something that can be changed back.Claude Code: ask

draw_cardsDraws a specified number of cards from a shuffled standard 52-card deck using a cryptographically secure random source.Reads text others writeNo findings
Why it is in this group
- 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Draws a specified number of cards from a shuffled standard 52-card deck using a cryptographically secure random source. (cost: 1 credit)
Annotations the server declares
- title: draw cards
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
generate_passwordGenerates a cryptographically secure random password with specified length and character type requirements (uppercase, lowercase, numbers, symbols).Reads text others write1 finding
Why it is in this group
- 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "generate_password" 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":true}; The name "generate_password" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
Generates a cryptographically secure random password with specified length and character type requirements (uppercase, lowercase, numbers, symbols). (cost: 1 credit)
Annotations the server declares
- title: generate password
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
generate_random_colorGenerates a random color in hexadecimal format (e.g., #A3F2B1) using a cryptographically secure random source.Reads text others write1 finding
Why it is in this group
- The name "generate_random_color" says "generate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "generate_random_color" 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":true}; The name "generate_random_color" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
Generates a random color in hexadecimal format (e.g., #A3F2B1) using a cryptographically secure random source. (cost: 1 credit)
Annotations the server declares
- title: generate random color
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
generate_random_numberGenerates a cryptographically secure random integer within a specified range (inclusive).Reads text others write1 finding
Why it is in this group
- The name "generate_random_number" says "generate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "generate_random_number" 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":true}; The name "generate_random_number" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
Generates a cryptographically secure random integer within a specified range (inclusive). Uses a secure random source. (cost: 1 credit)
Annotations the server declares
- title: generate random number
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
generate_random_stringGenerates a random string of specified length from a given character set using a cryptographically secure random source.Reads text others write2 findings
Why it is in this group
- The name "generate_random_string" says "generate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The input schema at properties.characters.description contains a 62-character base64 string.
  Matched text
  inputSchema.properties.characters.description: "...eneration, default 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'"
  What this check looks for
- Warn
  The server marks "generate_random_string" 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":true}; The name "generate_random_string" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
Generates a random string of specified length from a given character set using a cryptographically secure random source. Returns the generated string. (cost: 1 credit)
Annotations the server declares
- title: generate random string
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
generate_usernameGenerates a unique username by combining first name, last name, and birth year with a random suffix using a cryptographically secure random source.Reads text others write1 finding
Why it is in this group
- The name "generate_username" says "generate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "generate_username" 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":true}; The name "generate_username" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
Generates a unique username by combining first name, last name, and birth year with a random suffix using a cryptographically secure random source. (cost: 1 credit)
Annotations the server declares
- title: generate username
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: 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 outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write6: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; draw_cards
generate_password
generate_random_color
generate_random_number
generate_random_string
generate_username
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, 06:21 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: 6
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 6 tools that change things (6 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://ukdata.reliness.co.uk/mcp/generators: tools/list returned 6 tools to an anonymous client, including draw_cards (write), generate_random_color (write), generate_password (write), generate_random_number (write), generate_username (write) and 1 more
What this check looks for

Findings

Matches of fixed checks, with the text they matched.

6 warn

Warngenerate_random_color
The server marks "generate_random_color" 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":true}; The name "generate_random_color" says "generate": a word for a change.
What this check looks for
Warngenerate_password
The server marks "generate_password" 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":true}; The name "generate_password" says "generate": a word for a change.
What this check looks for
Warngenerate_random_number
The server marks "generate_random_number" 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":true}; The name "generate_random_number" says "generate": a word for a change.
What this check looks for
Warngenerate_username
The server marks "generate_username" 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":true}; The name "generate_username" says "generate": a word for a change.
What this check looks for
Warngenerate_random_string
The input schema at properties.characters.description contains a 62-character base64 string.
Matched text
inputSchema.properties.characters.description: "...eneration, default 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'"
What this check looks for
Warngenerate_random_string
The server marks "generate_random_string" 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":true}; The name "generate_random_string" 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 1.5.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http generators https://ukdata.reliness.co.uk/mcp/generators

claude mcp add --transport http generators https://ukdata.reliness.co.uk/mcp/generators

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__generators__draw_cards",
      "mcp__generators__generate_random_color",
      "mcp__generators__generate_password",
      "mcp__generators__generate_random_number",
      "mcp__generators__generate_username",
      "mcp__generators__generate_random_string"
    ],
    "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 generators. Review it before you use it.

Capability tags behind 6 rules

mcp__generators__draw_cards untrusted-input
mcp__generators__generate_random_color untrusted-input
mcp__generators__generate_password untrusted-input
mcp__generators__generate_random_number untrusted-input
mcp__generators__generate_username untrusted-input
mcp__generators__generate_random_string untrusted-input

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/uk.co.reliness/generators/verify?hash=cc158a9ec3afd2a109260a84a74579fc888c6d438ccfa99b6d7c20b70ebd5343" | jq -e '.changed == false'

Pinned hash cc158a9ec3af, from Nov 7, 2026, 12:18 UTC.

Watch

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

https://anlyon.dev/servers/uk.co.reliness/generators/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

[![anlyon.dev](https://anlyon.dev/badge/uk.co.reliness/generators.svg)](https://anlyon.dev/servers/uk.co.reliness/generators)

Source: MCP Registry. Synced Nov 7, 2026, 12:18 UTC.