AI agents call today to retrieve information from Calendar without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple query operation to retrieve calendar events for a specific date. It retrieves data without side effects, matching the Read category definition. Severity is low because exposure of today's calendar events, while potentially containing sensitive information, does not enable modification or destructive actions.
From the tool's definition Tool name 'today' and description 'Get all events for today' indicate data retrieval with no modification, deletion, or execution of external operations.
Attacks that exploit this kind of access
Get all events for today. It is categorised as a Read tool in the Calendar MCP Server, which means it retrieves data without modifying state.
Register the Calendar MCP server in PolicyLayer and add a rule for today: 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 Calendar. Nothing to install.
today 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 today 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 today. 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.
today is provided by the Calendar MCP server (p-w-4-z/calendar-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.
Teams ship this data inside their own products. See what a licence covers →