send_email_with_attachments

WHAT IT DOES

What send_email_with_attachments does on MCP Email Server with SendGrid

AI agents use send_email_with_attachments to create or update resources in MCP Email Server with SendGrid — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Email Server with SendGrid environment.

WHY IT NEEDS A POLICY

Why send_email_with_attachments needs a policy

This tool creates and sends emails with attachments, which is a Write operation—it generates and dispatches new data through an external service (SendGrid). While not destructive or financial, it modifies external state (recipient inbox) and has medium-to-high blast radius if misused by an agent (spam, phishing, information disclosure via malicious attachments or recipients).

From the tool's definition Tool name 'send_email_with_attachments' combined with server description stating it 'enables AI applications to send text, HTML, and template-based emails using SendGrid' with 'file attachments' support.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_email_with_attachments Rate-limited

send_email_with_attachments stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "send_email_with_attachments": {
      "limits": [
        {
          "counter": "send_email_with_attachments_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Email Server with SendGrid, so you can run agents against it safely.

FAQ

Questions about send_email_with_attachments

What does the send_email_with_attachments tool do? +

send_email_with_attachments. It is categorised as a Write tool in the MCP Email Server with SendGrid MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on send_email_with_attachments? +

Register the MCP Email Server with SendGrid MCP server in PolicyLayer and add a rule for send_email_with_attachments: 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 MCP Email Server with SendGrid. Nothing to install.

What risk level is send_email_with_attachments? +

send_email_with_attachments is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit send_email_with_attachments? +

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

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

send_email_with_attachments is provided by the MCP Email Server with SendGrid MCP server (wojkos/mcp_sg_mail). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.