AI agents call contacts_listContacts to retrieve information from Google MCP Remote without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves contact data without creating, modifying, or deleting any information. It is a straightforward data retrieval operation. Severity is low because exposure of contact lists, while a privacy concern, does not enable financial transactions, destructive actions, or code execution.
From the tool's definition Tool name 'contacts_listContacts' and description 'List contacts from the user' indicate a retrieval operation with no side effects. The verb 'list' is explicitly identified in the classification rules as a Read category action.
Documented attack patterns abuse exactly the kind of access contacts_listContacts gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google MCP Remote, and nothing reaches the server without passing your rules. This is the rule we recommend for contacts_listContacts:
{
"version": "1",
"default": "deny",
"tools": {
"contacts_listContacts": {}
}
}contacts_listContacts is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List contacts from the user. It is categorised as a Read tool in the Google MCP Remote MCP Server, which means it retrieves data without modifying state.
Register the Google MCP Remote MCP server in PolicyLayer and add a rule for contacts_listContacts: 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 Google MCP Remote. Nothing to install.
contacts_listContacts 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 contacts_listContacts 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 contacts_listContacts. 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.
contacts_listContacts is provided by the Google MCP Remote MCP server (vakharwalad23/google-mcp-remote). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Google MCP Remote, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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35 Google MCP Remote tools catalogued and risk-classified — across an index of 43,000+ MCP servers.