Get events from all configured calendars (local .ics files and webcal subscriptions) within a date window. Returns events grouped by day across all sources. Useful for checking your schedule, finding free time, or seeing what
AI agents call get_calendar_events to retrieve information from Vikunja MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs only data retrieval—it queries calendar data from .ics files and webcal subscriptions and presents the results. There are no write, delete, or destructive operations. The verb 'get' and use case (checking schedule, finding free time) confirm this is a read-only operation with minimal risk if misused by an AI agent.
From the tool's definition The tool 'get_calendar_events' retrieves events from calendars within a date window and returns them grouped by day.
Attacks that exploit this kind of access
Get events from all configured calendars (local .ics files and webcal subscriptions) within a date window. Returns events grouped by day across all sources. Useful for checking your schedule, finding free time, or seeing what. It is categorised as a Read tool in the Vikunja MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Vikunja MCP Server MCP server in PolicyLayer and add a rule for get_calendar_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 Vikunja MCP Server. Nothing to install.
get_calendar_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 get_calendar_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 get_calendar_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.
get_calendar_events is provided by the Vikunja MCP Server MCP server (lindenlion/vikunja-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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