Find available time slots in a date range across one or more accounts
AI agents call find_free_time to retrieve information from Mail Cal Drive without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool reads calendar availability information across accounts without modifying any data, triggering external operations, or causing irreversible changes. It is purely informational in nature, returning query results. The worst-case misuse would be gathering scheduling information, which poses minimal security risk.
From the tool's definition Tool performs "Find available time slots" which queries calendar data to identify free periods. This is a retrieval operation with no modification, creation, deletion, or execution of commands.
Attacks that exploit this kind of access
Find available time slots in a date range across one or more accounts. It is categorised as a Read tool in the Mail Cal Drive MCP Server, which means it retrieves data without modifying state.
Register the Mail Cal Drive MCP server in PolicyLayer and add a rule for find_free_time: 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 Mail Cal Drive. Nothing to install.
find_free_time 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_time 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_time. 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_time is provided by the Mail Cal Drive MCP server (rumbitopi/mail-cal-drive-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.
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