sendEmail
Sends a plain-text email from the authenticated Gmail account. Supports cc/bcc and optional threading by passing replyToMessageId (which copies threadId and sets In-Reply-To/References so the reply lands in the same thread).
This record as markdown: /tools/a-bonus-google-docs-mcp/sendemail.md
What sendEmail does on Claude MCP x Google Docs
AI agents invoke sendEmail to trigger actions in Claude MCP x Google Docs. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why sendEmail is rated High
Sending email is an external operation with real-world consequences: it delivers messages to third parties, cannot be unsent, and could be weaponized to send spam, phishing, or sensitive data exfiltration at scale. It falls under Execute (external operation) rather than Write (which implies reversible data modification).
From the tool's definition "Sends a plain-text email from the authenticated Gmail account" — triggers an external operation (email delivery) that cannot be recalled once sent; also supports cc/bcc amplifying blast radius
Attacks that exploit this kind of access
The rule that runs sendEmail safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Claude MCP x Google Docs, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sendEmail, this is the rule to start with:
sendEmail stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Claude MCP x Google Docs, apply this rule, and every sendEmail call is checked against it from then on.
Questions about sendEmail
Sends a plain-text email from the authenticated Gmail account. Supports cc/bcc and optional threading by passing replyToMessageId (which copies threadId and sets In-Reply-To/References so the reply lands in the same thread). It is categorised as a Execute tool in the Claude MCP x Google Docs MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Claude MCP x Google Docs MCP server in PolicyLayer and add a rule for sendEmail: 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 Claude MCP x Google Docs. Nothing to install.
sendEmail is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the sendEmail 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 sendEmail. 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.
sendEmail is provided by the Claude MCP x Google Docs MCP server (a-bonus/google-docs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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