util_email_validate
Validate an email and its domain-level delivery records before outreach, signup, or routing. Delx Agent Utilities are separate from the free witness protocol and may expose x402 utility pricing.
This record as markdown: /tools/delx-delx-mcp/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 | — | 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
Email validation is a read-only operation that checks if an email address is syntactically valid and if the domain's mail servers are reachable/configured. This retrieves or queries configuration data without side effects. The mention of 'x402 utility pricing' indicates a cost but does not constitute a financial transaction tool itself — the tool does not execute payments or commit funds, only performs validation.
From the tool's definition Tool name 'util_email_validate' and description 'Validate an email and its domain-level delivery records' — the operation is purely informational validation/verification of email addresses and DNS records (MX, SPF, DKIM checks implied by 'domain-level…
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. Delx Agent Utilities are separate from the free witness protocol and may expose x402 utility pricing. 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. 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/delx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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