util_extract_emails

Extract email-like addresses from text (regex only).

SERVERDelx MCP Server SOURCEdelx-mcp-server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-davidmosiah-delx-mcp-server/util-extract-emails.md

WHAT IT DOES

What util_extract_emails does on Delx MCP Server

AI agents call util_extract_emails to retrieve information from Delx MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why util_extract_emails is rated Low

Even though util_extract_emails only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs util_extract_emails safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Delx MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For util_extract_emails, this is the rule to start with:

util_extract_emails Allowed

util_extract_emails is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Delx MCP Server, apply this rule, and every util_extract_emails call is checked against it from then on.

FAQ

Questions about util_extract_emails

What does the util_extract_emails tool do? +

Extract email-like addresses from text (regex only). It is categorised as a Read tool in the Delx MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on util_extract_emails? +

Register the Delx MCP Server MCP server in PolicyLayer and add a rule for util_extract_emails: 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 Delx MCP Server. Nothing to install.

What risk level is util_extract_emails? +

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

Can I rate-limit util_extract_emails? +

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

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

util_extract_emails is provided by the Delx MCP Server MCP server (delx-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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