Fetch a single message by id, including its decoded body (text preferred, html fallback) and threading headers.
AI agents call gmail_read 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 retrieves and queries email message data without creating, modifying, or deleting anything. It is a straightforward Read operation. Severity is medium rather than low because email messages often contain sensitive personal or business information, authentication credentials, financial details, or confidential communications; unauthorized access via an AI agent could expose significant private data even…
From the tool's definition Tool description states 'Fetch a single message by id, including its decoded body (text preferred, html fallback) and threading headers.' The verb 'Fetch' and the retrieval-only nature of the operation indicate data retrieval without modification.
Attacks that exploit this kind of access
Fetch a single message by id, including its decoded body (text preferred, html fallback) and threading headers. 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_read: 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_read 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_read 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_read. 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_read 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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