util_email_validate
Validate an email and its domain-level delivery records before outreach, signup, or routing.
This record as markdown: /tools/io-github-davidmosiah-delx-mcp-server/util-email-validate.md
What util_email_validate does on Delx MCP Server
AI agents call util_email_validate 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.
| Parameter | Type | Required | Description |
|---|---|---|---|
email | string | Yes | Email address to validate |
timeout | integer | — | Timeout in seconds (1-15) |
Parameters from the server's own tool schema.
Why util_email_validate is rated Low
This tool performs email validation and checks domain-level delivery records (DNS lookups, MX records, etc.). These are read-only operations that retrieve and verify information without creating, modifying, deleting, or executing arbitrary code. The tool supports legitimate pre-outreach verification to reduce bounces and improve email deliverability, with no side effects or data mutations.
From the tool's definition Tool name contains 'validate' and description states 'Validate an email and its domain-level delivery records' - a query operation that checks email validity and DNS records without modifying data
Attacks that exploit this kind of access
The rule that runs util_email_validate 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_email_validate, this is the rule to start with:
util_email_validate is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Delx MCP Server, apply this rule, and every util_email_validate call is checked against it from then on.
Questions about util_email_validate
Validate an email and its domain-level delivery records before outreach, signup, or routing. It is categorised as a Read tool in the Delx MCP Server MCP Server, which means it retrieves data without modifying state.
util_email_validate accepts 2 parameters: email, timeout. Required: email. The full parameter table on this page comes from the server's own tool schema.
Register the Delx MCP Server MCP server in PolicyLayer and add a rule for util_email_validate: 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.
util_email_validate 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 util_email_validate 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 util_email_validate. 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.
util_email_validate 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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