calendar_check_availability

Check when you have free time in Google Calendar. Shows busy periods and free slots in a given time range. Useful for finding meeting times or checking schedule conflicts.

SERVERDialogbrain SOURCEhttps://api.dialogbrain.com/mcp

Low RISK CLASS

Category Read

Parameters 50 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-saloprj-dialogbrain/calendar-check-availability.md

WHAT IT DOES

What calendar_check_availability does on Dialogbrain

AI agents call calendar_check_availability to retrieve information from Dialogbrain without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`end_time`	string	—	End date/time to check availability (YYYY-MM-DD or ISO 8601). Defaults to end of start_time day, or 7 days from now.
`start_time`	string	—	Start date/time to check availability (YYYY-MM-DD or ISO 8601). Defaults to start of today.
`calendar_id`	string	—	Calendar ID to check. Defaults to primary calendar.
`working_hours_only`	boolean	—	If true, only show free slots during working hours (9 AM - 6 PM). OMIT to show all free time (the default).
`min_duration_minutes`	integer	—	Minimum duration in minutes for free slots. Filters out short gaps. Default: 30 minutes.

Parameters from the server's own tool schema.

RISK

Why calendar_check_availability is rated Low

This tool only queries Google Calendar availability data and returns scheduling information. It performs no write operations (does not create/modify events), execute operations (does not run commands), destructive operations (does not delete data), or financial operations. The sole function is data retrieval to assist with scheduling decisions, making it a straightforward Read category tool with low severity.

From the tool's definition Tool description states it 'shows busy periods and free slots' and is useful for 'finding meeting times or checking schedule conflicts' — purely informational operations that retrieve calendar data without modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs calendar_check_availability safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Dialogbrain, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For calendar_check_availability, this is the rule to start with:

calendar_check_availability Allowed

calendar_check_availability is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "calendar_check_availability": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Dialogbrain, apply this rule, and every calendar_check_availability call is checked against it from then on.

FAQ

Questions about calendar_check_availability

What does the calendar_check_availability tool do? +

Check when you have free time in Google Calendar. Shows busy periods and free slots in a given time range. Useful for finding meeting times or checking schedule conflicts. It is categorised as a Read tool in the Dialogbrain MCP Server, which means it retrieves data without modifying state.

What parameters does calendar_check_availability accept? +

calendar_check_availability accepts 5 parameters: end_time, start_time, calendar_id, working_hours_only, min_duration_minutes. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on calendar_check_availability? +

Register the Dialogbrain MCP server in PolicyLayer and add a rule for calendar_check_availability: 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 Dialogbrain. Nothing to install.

What risk level is calendar_check_availability? +

calendar_check_availability is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit calendar_check_availability? +

Yes. Add a rate_limit block to the calendar_check_availability 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.

How do I block calendar_check_availability completely? +

Set action: deny in the PolicyLayer policy for calendar_check_availability. 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.

What MCP server provides calendar_check_availability? +

calendar_check_availability is provided by the Dialogbrain MCP server (https://api.dialogbrain.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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