AI agents call calendarGet to retrieve information from Routine without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves calendar information, which is a read-only operation with no side effects on data. Severity is medium rather than low because calendar data can contain sensitive information about user schedules, availability, and personal commitments that could be misused by an agent (e.g., identifying optimal times for social engineering, understanding a user's movements and commitments).
From the tool's definition Tool name 'calendarGet' and description 'A calendar' indicate a retrieval operation that accesses calendar data without modification. The 'Get' verb and read-only nature of querying calendar information classify this as a Read operation.
Attacks that exploit this kind of access
A calendar. It is categorised as a Read tool in the Routine MCP Server, which means it retrieves data without modifying state.
Register the Routine MCP server in PolicyLayer and add a rule for calendarGet: 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 Routine. Nothing to install.
calendarGet 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 calendarGet 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 calendarGet. 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.
calendarGet is provided by the Routine MCP server (routineco/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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