ClawHub
Back to skill

Security audit

scryfall-card

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward Magic: The Gathering card lookup helper that uses the public Scryfall API and does not show hidden persistence, credential access, or unrelated local activity.

Install this if you want an agent to look up Magic: The Gathering card data from Scryfall. Be aware it sends your card search terms to Scryfall, and invoke it only for MTG-related questions when wording is ambiguous.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • 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 (2)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
91% confidence
Finding

The skill instructs the agent to perform outbound network access to the Scryfall API but does not declare any explicit tool scope or allowed-tools boundary. This weakens least-privilege controls and can allow the skill to be invoked in environments where network use is not clearly authorized or auditable, increasing the chance of unintended external data access.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
89% confidence
Finding

The manifest description says to use the skill for 'deck building questions' and 'requests for card information' in addition to mentions of MTG or Magic. Those phrases are broad enough that they could overlap with general gaming or advice conversations, and the file does not provide explicit exclusion conditions or negative examples to narrow invocation scope.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.