ToolTrust
A4/100
Smithery

node2flow-google-calendar

mcpsmithery

@Smithery

MCP server for Google Calendar : create events, manage calendars, check availability, and share calendars through 28 tools via the Model Context Protocol. ## Features - Create, update, and delete calendar events (timed and all-day) - Quick add events from natural language - Manage recurring events with RRULE support - Share calendars with ACL (access control) management - Check availability with free/busy queries - Manage multiple calendars and subscriptions - Full OAuth 2.0 authentication with refresh tokens ## 28 Tools **Events (10)**: List, get, create, update (PUT), patch (PATCH), delete, quick add, move, list instances, import **CalendarList (5)**: List subscribed calendars, get entry, add (subscribe), update display settings, remove (unsubscribe) **Calendars (5)**: Get metadata, create, update, delete, clear all events **ACL (5)**: List rules, get rule, create (share), update permission, delete (revoke) **Utility (3)**: Query free/busy, get color palette, list settings ## Configuration - `GOOGLE_CLIENT_ID` : OAuth 2.0 Client ID from Google Cloud Console - `GOOGLE_CLIENT_SECRET` : OAuth 2.0 Client Secret - `GOOGLE_REFRESH_TOKEN` : Refresh token with Calendar scope

By Smithery | 54 findings | Scanned 7/4/2026 | tooltrust-scanner/v0.3.19

11 Low43 Info

Risk Summary

Safe With Normal Controls

Dep Visibility is the main signal, but overall risk remains within an acceptable range.

Potential impact: This finding indicates the tool should be reviewed before it is trusted.

Recommended action: No high-risk findings were detected in this scan, but you should still apply least-privilege defaults and rescan after changes.

Suggested policy: keep this tool behind manual approval, do not allow unattended runs, and re-scan after narrowing risky permissions.

Security Findings (54)

  • LowAS-002

    ⚠️Excessive Permissions ×4

    input schema exposes 16 properties (threshold: 10)

    gcal_create_eventgcal_patch_event

    input schema exposes 17 properties (threshold: 10)

    gcal_update_event

    input schema exposes 11 properties (threshold: 10)

    gcal_import_event

    Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

  • LowAS-011

    ℹ️Missing Rate-Limit / Timeout ×7

    tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration

    gcal_create_eventgcal_update_eventgcal_patch_eventgcal_import_eventgcal_create_calendargcal_update_calendargcal_query_freebusy

    Fix: Declare explicit rate-limit, timeout, and retry configuration for all network and execution tools. Implement exponential back-off and surface resource state to the calling agent.

  • InfoAS-002

    ⚠️Excessive Permissions ×15

    declared capabilities: database access

    gcal_list_events

    declared capabilities: code/command execution, filesystem access

    gcal_create_eventgcal_update_eventgcal_import_eventgcal_create_calendargcal_update_calendar

    declared capabilities: code/command execution

    gcal_patch_event

    declared capabilities: filesystem access

    gcal_delete_eventgcal_update_calendar_entrygcal_remove_calendargcal_delete_calendargcal_create_aclgcal_update_aclgcal_delete_acl

    declared capabilities: network access

    gcal_query_freebusy

    Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

  • InfoAS-014

    ℹ️Dependency Inventory Unavailable ×28

    Tool did not expose metadata.dependencies or repo_url, so supply-chain coverage is limited.

    gcal_list_eventsgcal_get_eventgcal_create_eventgcal_update_eventgcal_patch_eventgcal_delete_eventgcal_quick_addgcal_move_eventgcal_list_instancesgcal_import_eventgcal_list_calendarsgcal_get_calendar_entrygcal_add_calendargcal_update_calendar_entrygcal_remove_calendargcal_get_calendargcal_create_calendargcal_update_calendargcal_delete_calendargcal_clear_calendargcal_list_aclgcal_get_aclgcal_create_aclgcal_update_aclgcal_delete_aclgcal_query_freebusygcal_get_colorsgcal_list_settings

    Fix: Review and remediate the identified issue.

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