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Security audit

Gws Calendar

Security checks for vulnerabilities and agentic risk

Overview

This is a straightforward Google Calendar CLI reference that discloses powerful calendar operations but does not include hidden code or deceptive behavior.

Install only if you intend to let the agent use Google Calendar through gws. Treat delete, clear, ACL update, move, patch, update, insert, import, and quickAdd as state-changing actions that should require explicit user approval and careful schema/parameter review first.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Missing User Warnings

Medium
Confidence
87% confidence
Finding
The skill explicitly documents destructive calendar operations such as clearing a primary calendar and deleting calendars, but it does not include any cautionary guidance, confirmation requirements, or clear warnings about irreversible data loss. In an agent setting, this increases the chance that a user or automated workflow invokes destructive actions without understanding the consequences.

Missing User Warnings

Medium
Confidence
86% confidence
Finding
The events section lists delete, move, patch, update, import, insert, and quickAdd operations without warning that these commands can modify, relocate, or remove user calendar data. In a productivity skill that may be used by autonomous agents, the absence of safety guidance makes unintended or unsafe state-changing actions more likely.

Static analysis

No suspicious patterns detected.