Return the signed-in Google account
AI agents call gmail_whoami to retrieve information from Personal Gmail without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and returns the currently authenticated Google account information. It performs no modifications, deletions, or financial operations. The blast radius is low since it only exposes account identity (email address), though that could marginally assist reconnaissance.
From the tool's definition 'Return the signed-in Google account' — purely retrieves identity information with no side effects
Attacks that exploit this kind of access
Return the signed-in Google account. It is categorised as a Read tool in the Personal Gmail MCP Server, which means it retrieves data without modifying state.
Register the Personal Gmail MCP server in PolicyLayer and add a rule for gmail_whoami: 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 Personal Gmail. Nothing to install.
gmail_whoami is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the gmail_whoami 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 gmail_whoami. 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.
gmail_whoami is provided by the Personal Gmail MCP server (jaingxyz/personal-gmail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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