Find available time slots in the calendar.
AI agents call find_free_slots to retrieve information from Google Calendar MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
find_free_slots retrieves and analyzes calendar data to identify free time but does not create, modify, or delete any calendar entries. It is a pure read operation with no side effects. Severity is low because unauthorized access to free time slots poses minimal direct harm compared to write or destructive calendar operations.
From the tool's definition Tool description states 'Find available time slots in the calendar' — a retrieval operation that queries calendar data without modifying it.
Attacks that exploit this kind of access
Find available time slots in the calendar. It is categorised as a Read tool in the Google Calendar MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Google Calendar MCP Server MCP server in PolicyLayer and add a rule for find_free_slots: 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 Calendar MCP Server. Nothing to install.
find_free_slots 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 find_free_slots 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 find_free_slots. 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.
find_free_slots is provided by the Google Calendar MCP Server MCP server (samrind/gcal-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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