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Fair Random

by tools.intoperson.com · remote · no sign-in to list tools · v1.0.0 · published by com.intoperson.tools

Fair, reproducible randomness for agents: dice, coins, integers, list picks, shuffles, with seeds.

Changes · 5
CompareRegistry entry

6 tools: 5 change things and 1 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http fair-random https://tools.intoperson.com/mcp/random

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnshuffle_list

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

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The name "shuffle_list" says "list": a word for reading.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

6 tools

Changes things 5Claude Code: ask
  • flip_coinFlip a fair coin 1 to 100 times.No 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.
    Description, as the server wrote it
    Flip a fair coin 1 to 100 times.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
    • title: Flip a coin
  • prismtect_numberA personal two-digit number from the Prismtect glass prism, for a user who asks for a lucky number, a number of their own or a number for today.No 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.
    Description, as the server wrote it
    A personal two-digit number from the Prismtect glass prism, for a user who asks for a lucky number, a number of their own or a number for today. Only a human touch can draw it, so this tool gives no number: it gives the link your user taps themselves. Pass the link on.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Prismtect number (human touch only)
  • random_integerIntegers from min to max inclusive, 1 to 1000 of them, with or without repeats.No 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.
    Description, as the server wrote it
    Integers from min to max inclusive, 1 to 1000 of them, with or without repeats. The range may hold at most 2^32 values.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
    • title: Random integers
  • roll_diceRoll 1 to 100 dice with 2 to 1000 sides each (default one six-sided die).No 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.
    Description, as the server wrote it
    Roll 1 to 100 dice with 2 to 1000 sides each (default one six-sided die).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
    • title: Roll dice
  • shuffle_listPut up to 1000 items in a random order; every order is equally likely.1 finding

    Why it is in this group

    • The name "shuffle_list" says "list": a word for reading.
    • The description's first verb is "put": 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 "shuffle_list" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The name "shuffle_list" says "list": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Put up to 1000 items in a random order; every order is equally likely.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
    • title: Shuffle a list
Only reads 1Claude Code: allow
  • pick_from_listPick 1 or more items from a list of up to 1000, each equally likely.No findings

    Why it is in this group

    • The name "pick_from_list" says "list": a word for reading.
    Description, as the server wrote it
    Pick 1 or more items from a list of up to 1000, each equally likely. Without repeats by default.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
    • title: Pick from a list

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.

Install

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

claude mcp add --transport http fair-random https://tools.intoperson.com/mcp/random

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__fair-random__pick_from_list"
    ],
    "ask": [
      "mcp__fair-random__roll_dice",
      "mcp__fair-random__flip_coin",
      "mcp__fair-random__random_integer",
      "mcp__fair-random__shuffle_list",
      "mcp__fair-random__prismtect_number"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as fair-random. Review it before you use it.