smartlead_get_email_headers

THE RISK

Low Risk

Why smartlead_get_email_headers needs a policy

This tool retrieves and queries email header information without any side effects. It performs a read-only operation on existing data, consistent with the Read category for data retrieval tools that do not modify state.

From the tool's definition Tool name 'smartlead_get_email_headers' and description 'Get details of the email headers for a specific email' indicate retrieval of existing email metadata with no modification, deletion, or execution of external operations.

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

POLICY

How to control smartlead_get_email_headers

PolicyLayer is an MCP gateway — it sits between your AI agents and Smartlead Simplified MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for smartlead_get_email_headers:

policy.json

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

smartlead_get_email_headers 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 Smartlead Simplified 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.

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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 →
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FAQ

Questions about smartlead_get_email_headers

What does the smartlead_get_email_headers tool do? +

Get details of the email headers for a specific email. It is categorised as a Read tool in the Smartlead Simplified MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on smartlead_get_email_headers? +

Register the Smartlead Simplified MCP Server MCP server in PolicyLayer and add a rule for smartlead_get_email_headers: 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 Smartlead Simplified MCP Server. Nothing to install.

What risk level is smartlead_get_email_headers? +

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

Can I rate-limit smartlead_get_email_headers? +

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

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

smartlead_get_email_headers is provided by the Smartlead Simplified MCP Server MCP server (jonathan-politzki/smartlead-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Smartlead Simplified MCP Server tool call.

Start from Smartlead Simplified 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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