Security audit

Wc Words Tool

Security checks for vulnerabilities and agentic risk

Overview

This is a simple word-count skill with overstated documentation, but no evidence of hidden, destructive, persistent, or data-exfiltrating behavior.

Install only if you need a basic stdin word counter; the documented advanced options appear unsupported and should not be relied on without updating the implementation.

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

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
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (1)

Tp4

High

Category: MCP Tool Poisoning
Confidence: 98% confidence
Finding: The declared description promises several analysis capabilities: total words, unique words, per-line counts, and frequency analysis. The supplied code only reads stdin, splits on whitespace, and prints the total token count. There is no logic for unique counting, line-by-line analysis, or frequency metrics. This is a material mismatch because the implemented behavior is substantially narrower than the declared primary purpose.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.