email_create_draft · M365 MCP: Risk & Policy

WHAT IT DOES

What email_create_draft does on M365

AI agents use email_create_draft to create or update resources in M365 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your M365 environment.

WHY IT NEEDS A POLICY

Why email_create_draft needs a policy

Creating email drafts modifies Outlook state by adding new draft messages. This is reversible (drafts can be discarded or deleted) and does not immediately send or permanently delete data, placing it in the Write category. Severity is medium because a compromised agent could create numerous drafts, spam-like content, or draft messages for social engineering, but drafts are not yet sent and can be recovered.

From the tool's definition Tool name 'email_create_draft' indicates creation of email drafts in Outlook, which is a write operation that creates new data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

email_create_draft Rate-limited

email_create_draft 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": {
    "email_create_draft": {
      "limits": [
        {
          "counter": "email_create_draft_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 M365, so you can run agents against it safely.

FAQ

Questions about email_create_draft

What does the email_create_draft tool do? +

email_create_draft. It is categorised as a Write tool in the M365 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on email_create_draft? +

Register the M365 MCP server in PolicyLayer and add a rule for email_create_draft: 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 M365. Nothing to install.

What risk level is email_create_draft? +

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

Can I rate-limit email_create_draft? +

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

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

email_create_draft is provided by the M365 MCP server (robin-collins/m365-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.