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Road User Tools

by watchandnavy.com · remote · no sign-in to list tools · v1.0.1 · published by com.watchandnavy

Fuel cost, fuel economy, journey time, tyre pressure, power, torque, speed and distance calculators.

Final · 6Changes · 2
CompareRegistry entry

9 tools: 6 do something that can't be undone, 2 change things and 1 only read.

Scanned Oct 21, 2026

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

claude mcp add --transport http road-user-tools https://roaduser.tools/mcp

Tools

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

9 tools

Can't be undone 6Claude Code: ask
  • convert_distanceConvert a distance value between kilometres, metres, miles, yards, and feet.Can send data outNo findings

    Why it is in this group

    • The name "convert_distance" says "convert": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.

    What it can reach

    • outboundThe input takes a destination (input.to): what the tool writes goes there.
    Description, as the server wrote it
    Convert a distance value between kilometres, metres, miles, yards, and feet.
  • convert_fuel_economyConvert a fuel economy value between UK/Imperial MPG, US MPG, litres per 100 km, and kilometres per litre.Can send data outNo findings

    Why it is in this group

    • The name "convert_fuel_economy" says "convert": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.

    What it can reach

    • outboundThe input takes a destination (input.to): what the tool writes goes there.
    Description, as the server wrote it
    Convert a fuel economy value between UK/Imperial MPG, US MPG, litres per 100 km, and kilometres per litre.
  • convert_powerConvert an engine power value between kilowatts, mechanical horsepower (hp), and metric horsepower (PS).Can send data outNo findings

    Why it is in this group

    • The name "convert_power" says "convert": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.

    What it can reach

    • outboundThe input takes a destination (input.to): what the tool writes goes there.
    Description, as the server wrote it
    Convert an engine power value between kilowatts, mechanical horsepower (hp), and metric horsepower (PS).
  • convert_pressureConvert a tyre pressure value between PSI, bar, and kPa.Can send data outNo findings

    Why it is in this group

    • The name "convert_pressure" says "convert": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.

    What it can reach

    • outboundThe input takes a destination (input.to): what the tool writes goes there.
    Description, as the server wrote it
    Convert a tyre pressure value between PSI, bar, and kPa.
  • convert_speedConvert a speed value between km/h, mph, m/s, and knots.Can send data outNo findings

    Why it is in this group

    • The name "convert_speed" says "convert": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.

    What it can reach

    • outboundThe input takes a destination (input.to): what the tool writes goes there.
    Description, as the server wrote it
    Convert a speed value between km/h, mph, m/s, and knots.
  • convert_torqueConvert a torque value between newton metres (N·m) and pound-feet (lb·ft).Can send data outNo findings

    Why it is in this group

    • The name "convert_torque" says "convert": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.

    What it can reach

    • outboundThe input takes a destination (input.to): what the tool writes goes there.
    Description, as the server wrote it
    Convert a torque value between newton metres (N·m) and pound-feet (lb·ft).
Changes things 2Claude Code: ask
  • calculate_fuel_costCalculate fuel required and journey cost from distance, fuel economy, and fuel price — including cost per kilometre and per mile.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.
    Description, as the server wrote it
    Calculate fuel required and journey cost from distance, fuel economy, and fuel price — including cost per kilometre and per mile.
  • calculate_journey_timeCalculate journey duration from distance and average speed.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.
    Description, as the server wrote it
    Calculate journey duration from distance and average speed.
Only reads 1Claude Code: allow
  • list_toolsList the public Road User Tools calculators currently available.No findings

    Why it is in this group

    • The name "list_tools" says "list": a word for reading.
    Description, as the server wrote it
    List the public Road User Tools calculators currently available.

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.

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 out6
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.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http road-user-tools https://roaduser.tools/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": [
      "mcp__road-user-tools__list_tools"
    ],
    "ask": [
      "mcp__road-user-tools__convert_fuel_economy",
      "mcp__road-user-tools__calculate_fuel_cost",
      "mcp__road-user-tools__convert_pressure",
      "mcp__road-user-tools__convert_power",
      "mcp__road-user-tools__convert_torque",
      "mcp__road-user-tools__convert_speed",
      "mcp__road-user-tools__convert_distance",
      "mcp__road-user-tools__calculate_journey_time"
    ],
    "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 road-user-tools. Review it before you use it.

Capability tags behind 6 rules
  • mcp__road-user-tools__convert_fuel_economy outbound
  • mcp__road-user-tools__convert_pressure outbound
  • mcp__road-user-tools__convert_power outbound
  • mcp__road-user-tools__convert_torque outbound
  • mcp__road-user-tools__convert_speed outbound
  • mcp__road-user-tools__convert_distance outbound