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Security audit

google-ads-copy-generator

Security checks for vulnerabilities and agentic risk

Overview

The bundled skill uses limited local file access, but its incomplete character checks require manual review.

Manually check each ad asset, especially Performance Max fields. Choose an output directory where replacing ad-brief.md is acceptable. The optional Windows app requires a separate trust decision; its executable was outside this review ([publisher repository](https://github.com/rapidworker1/Multiple-AI-models-Toolkit)).

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
Vulnerability Patterns
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The code is a basic validator and report writer for supplied text, not an ad-copy generator. Its list handling also makes the claim that every field is checked against real limits inaccurate for multiple headlines or descriptions. Local input reading and report writing are ordinary supporting operations; no unrelated resource access or external account actions are present.

Content

No source excerpt is available for this finding.

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: file_write.

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

Character limits are checked against concatenated asset lists rather than individual ad assets.

Low
Category
Excessive Agency
Confidence
99% confidence
Finding

The manifest promises to check every field against real Google Ads character limits, but L092–L093 join all headlines or descriptions with semicolons before measuring their combined length. Google Ads limits apply to each individual asset, so multiple valid headlines or descriptions can incorrectly be reported as too long, and individual assets receive no validation result.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.