convert_rem_px

THE RISK

Low Risk

Why convert_rem_px needs a policy

This tool performs a pure unit conversion calculation (REM to PX or vice versa). It only computes and returns a value with no side effects, no data modification, no external operations, and no destructive actions.

From the tool's definition Convert between REM and PX units for CSS. Example: Convert 1.5rem to pixels, or 24px to rem units.

Documented attack patterns abuse exactly the kind of access convert_rem_px gives an agent:

POLICY

How to control convert_rem_px

PolicyLayer is an MCP gateway — it sits between your AI agents and IT Tools MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for convert_rem_px:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "convert_rem_px": {}
  }
}

convert_rem_px is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register IT Tools MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about convert_rem_px

What does the convert_rem_px tool do? +

Convert between REM and PX units for CSS. Example: Convert 1.5rem to pixels, or 24px to rem units. It is categorised as a Read tool in the IT Tools MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on convert_rem_px? +

Register the IT Tools MCP Server MCP server in PolicyLayer and add a rule for convert_rem_px: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches IT Tools MCP Server. Nothing to install.

What risk level is convert_rem_px? +

convert_rem_px is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit convert_rem_px? +

Yes. Add a rate_limit block to the convert_rem_px rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block convert_rem_px completely? +

Set action: deny in the PolicyLayer policy for convert_rem_px. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides convert_rem_px? +

convert_rem_px is provided by the IT Tools MCP Server MCP server (wrenchpilot/it-tools-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every IT Tools MCP Server tool call.

Start from IT Tools MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →