decode_safelink

THE RISK

Low Risk

Why decode_safelink needs a policy

This tool decodes/unwraps SafeLink URLs, a read-only operation that extracts the original URL from a Microsoft Outlook SafeLink wrapper. No data is written, modified, or deleted; it simply transforms input and returns a result.

From the tool's definition Decode Microsoft Outlook SafeLink URLs

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

POLICY

How to control decode_safelink

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 decode_safelink:

policy.json

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

decode_safelink 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 →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about decode_safelink

What does the decode_safelink tool do? +

Decode Microsoft Outlook SafeLink URLs. 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 decode_safelink? +

Register the IT Tools MCP Server MCP server in PolicyLayer and add a rule for decode_safelink: 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 decode_safelink? +

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

Can I rate-limit decode_safelink? +

Yes. Add a rate_limit block to the decode_safelink 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 decode_safelink completely? +

Set action: deny in the PolicyLayer policy for decode_safelink. 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 decode_safelink? +

decode_safelink 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 →