AI agents use createGmailDraft to create or update resources in Google Workspace MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Google Workspace MCP Server environment.
This tool performs a create operation that modifies Gmail state by adding a new draft. While drafts are unsent, they are persistent artifacts that exist in the user's mailbox. An AI agent could misuse this to create misleading, fraudulent, or sensitive draft emails that could later be sent by the user or exploited for social engineering.
From the tool's definition The tool name 'createGmailDraft' and description 'Create a draft email in Gmail' indicate that it creates and stores a new email message in draft form without sending it. This is a reversible write operation—drafts can be edited or deleted.
Documented attack patterns abuse exactly the kind of access createGmailDraft gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google Workspace MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for createGmailDraft:
{
"version": "1",
"default": "deny",
"tools": {
"createGmailDraft": {
"limits": [
{
"counter": "creategmaildraft_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}createGmailDraft 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.
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Create a draft email in Gmail. It is categorised as a Write tool in the Google Workspace MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Google Workspace MCP Server MCP server in PolicyLayer and add a rule for createGmailDraft: 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 Google Workspace MCP Server. Nothing to install.
createGmailDraft is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the createGmailDraft 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 createGmailDraft. 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.
createGmailDraft is provided by the Google Workspace MCP Server MCP server (sputnicyoji/google-workspace-mcp-with-script). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Google Workspace 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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72 Google Workspace MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.