Normalize email addresses (remove dots, plus aliases, etc.)
AI agents call normalize_email to retrieve information from IT Tools MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a purely transformational/read operation on input text — it normalizes email addresses by removing dots and plus aliases. It has no side effects, does not write or delete data, and does not interact with external systems. It simply processes and returns a transformed string.
From the tool's definition Normalize email addresses (remove dots, plus aliases, etc.)
Documented attack patterns abuse exactly the kind of access normalize_email gives an agent:
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 normalize_email:
{
"version": "1",
"default": "deny",
"tools": {
"normalize_email": {}
}
}normalize_email is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Normalize email addresses (remove dots, plus aliases, etc.). It is categorised as a Read tool in the IT Tools MCP Server MCP Server, which means it retrieves data without modifying state.
Register the IT Tools MCP Server MCP server in PolicyLayer and add a rule for normalize_email: 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.
normalize_email is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the normalize_email 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.
Set action: deny in the PolicyLayer policy for normalize_email. 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.
normalize_email 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.
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.
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119 IT Tools MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.