AI agents call list-labels to retrieve information from Enhanced Gmail MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns label data without creating, modifying, or deleting anything. It is a straightforward read operation that retrieves information about the user's Gmail label organization. The low severity reflects minimal risk even if an AI agent misuses it—at worst, it exposes the structure of the user's labels, but causes no data loss or unwanted actions.
From the tool's definition Tool name 'list-labels' and description 'Lists all labels in the user' indicate a retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access list-labels gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Enhanced Gmail MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list-labels:
{
"version": "1",
"default": "deny",
"tools": {
"list-labels": {}
}
}list-labels is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Lists all labels in the user. It is categorised as a Read tool in the Enhanced Gmail MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Enhanced Gmail MCP Server MCP server in PolicyLayer and add a rule for list-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 Enhanced Gmail MCP Server. Nothing to install.
list-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-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-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-labels is provided by the Enhanced Gmail MCP Server MCP server (theposch/gmail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Enhanced Gmail MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
27 Enhanced Gmail MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.