AI agents call calendar_listEvents 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 returns calendar data without creating, modifying, deleting, or executing any actions. It is a straightforward read operation that retrieves information about upcoming events. The severity is low because disclosure of calendar event metadata poses minimal risk compared to other categories, though it does involve personal scheduling information.
From the tool's definition Tool name 'calendar_listEvents' and description 'List upcoming calendar events' indicate a retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access calendar_listEvents 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 calendar_listEvents:
{
"version": "1",
"default": "deny",
"tools": {
"calendar_listEvents": {}
}
}calendar_listEvents 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.
List upcoming calendar events. 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 calendar_listEvents: 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.
calendar_listEvents 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 calendar_listEvents 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 calendar_listEvents. 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.
calendar_listEvents 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.
Free to start. No card required.
35 Google MCP Remote tools catalogued and risk-classified — across an index of 43,000+ MCP servers.