quick_add · Gcalendar MCP: Risk & Policy

WHAT IT DOES

What quick_add does on Gcalendar

AI agents use quick_add to create or update resources in Gcalendar — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Gcalendar environment.

WHY IT NEEDS A POLICY

Why quick_add needs a policy

This tool creates calendar events, which modifies data but is fully reversible (events can be deleted). It does not execute arbitrary code, delete data permanently, or move money. The severity is medium because misuse could spam a user's calendar or create fraudulent appointments, but the impact is limited to calendar data and the changes are undoable.

From the tool's definition Tool description explicitly states 'Create event from natural language.' The tool creates calendar events, which are reversible data modifications.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

quick_add Rate-limited

quick_add stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "quick_add": {
      "limits": [
        {
          "counter": "quick_add_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Gcalendar, so you can run agents against it safely.

FAQ

Questions about quick_add

What does the quick_add tool do? +

Create event from natural language. It is categorised as a Write tool in the Gcalendar MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on quick_add? +

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

What risk level is quick_add? +

quick_add is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit quick_add? +

Yes. Add a rate_limit block to the quick_add 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 quick_add completely? +

Set action: deny in the PolicyLayer policy for quick_add. 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 quick_add? +

quick_add is provided by the Gcalendar MCP server (sandeepmallareddy/gcalendar-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.