List events in a time range. Recurring series are expanded into individual instances, ordered by start time. Defaults to the primary calendar.
AI agents call gmail_calendar_list_events 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 calendar event data within a specified time range without creating, modifying, deleting, or executing any operations. It is purely informational and has no side effects on the calendar or any other system. The blast radius of misuse is minimal—an attacker could enumerate calendar events but could not alter them or trigger actions.
From the tool's definition Tool description states it 'List events in a time range' with no modification, deletion, or execution capabilities. The verb 'list' and the read-only nature of querying calendar events without side effects align with the Read category.
Attacks that exploit this kind of access
List events in a time range. Recurring series are expanded into individual instances, ordered by start time. Defaults to the primary calendar. 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_calendar_list_events: 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_calendar_list_events 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_calendar_list_events 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_calendar_list_events. 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_calendar_list_events 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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