AI agents call caldav_get_today_events to retrieve information from CalDAV MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves calendar data for a specific date without modifying, deleting, or executing any operations. It is a straightforward query operation that poses minimal risk even if misused by an AI agent, as it only exposes existing calendar information the user already has access to.
From the tool's definition Tool name 'caldav_get_today_events' and description 'Get all events for today' indicate a retrieval operation with no side effects. The verb 'get' and the read-only nature of querying today's calendar events confirm this is a Read category tool.
Documented attack patterns abuse exactly the kind of access caldav_get_today_events gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CalDAV MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for caldav_get_today_events:
{
"version": "1",
"default": "deny",
"tools": {
"caldav_get_today_events": {}
}
} caldav_get_today_events is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get all events for today. It is categorised as a Read tool in the CalDAV MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CalDAV MCP Server MCP server in PolicyLayer and add a rule for caldav_get_today_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 CalDAV MCP Server. Nothing to install.
caldav_get_today_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 caldav_get_today_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 caldav_get_today_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.
caldav_get_today_events is provided by the CalDAV MCP Server MCP server (madbonez/caldav-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from CalDAV MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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8 CalDAV MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.