Queries free/busy information for one or more calendars within a specified time range.
AI agents call query_calendar_freebusy to retrieve information from Playwright Stealth without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves calendar availability data without side effects or the ability to modify, delete, or execute operations. It is a straightforward read operation that fetches metadata about calendar availability, posing minimal security risk. The blast radius of misuse is low—an attacker could discover when users are busy or free, but cannot modify calendars, execute actions, or cause destructive harm.
From the tool's definition Tool queries free/busy information for calendars within a time range, retrieving calendar availability data without modifying, executing actions, deleting, or committing financial obligations.
Documented attack patterns abuse exactly the kind of access query_calendar_freebusy gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Playwright Stealth, and nothing reaches the server without passing your rules. This is the rule we recommend for query_calendar_freebusy:
{
"version": "1",
"default": "deny",
"tools": {
"query_calendar_freebusy": {}
}
}query_calendar_freebusy is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Queries free/busy information for one or more calendars within a specified time range. It is categorised as a Read tool in the Playwright Stealth MCP Server, which means it retrieves data without modifying state.
Register the Playwright Stealth MCP server in PolicyLayer and add a rule for query_calendar_freebusy: 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 Playwright Stealth. Nothing to install.
query_calendar_freebusy 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 query_calendar_freebusy 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 query_calendar_freebusy. 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.
query_calendar_freebusy is provided by the Playwright Stealth MCP server (pulsemcp/mcp-servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Playwright Stealth, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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68 Playwright Stealth tools catalogued and risk-classified — across an index of 43,000+ MCP servers.