Retrieves all available Gmail labels
AI agents call list_email_labels to retrieve information from Gmail AutoAuth MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves/lists data about Gmail labels without modifying, deleting, or executing any actions. It is a non-destructive read operation with minimal security impact even if misused by an AI agent.
From the tool's definition Tool name is 'list_email_labels' and description states it 'Retrieves all available Gmail labels' — a pure query operation with no side effects.
Attacks that exploit this kind of access
Retrieves all available Gmail labels. It is categorised as a Read tool in the Gmail AutoAuth MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Gmail AutoAuth MCP Server MCP server in PolicyLayer and add a rule for list_email_labels: 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 Gmail AutoAuth MCP Server. Nothing to install.
list_email_labels 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 list_email_labels 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 list_email_labels. 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.
list_email_labels is provided by the Gmail AutoAuth MCP Server MCP server (stephenlreed/gmail-mcp-server). 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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