Back to skill

Security audit

tool-economy

Security checks for vulnerabilities and agentic risk

Overview

This skill is a transparent tool-efficiency guide with a local log analyzer and no hidden execution, persistence, or data exfiltration behavior found.

Install this if you want agent behavior guidance around fewer, more deliberate tool calls. Review the guidance if your workflows require strict verification after edits, because some advice favors caching and avoiding re-reads for efficiency; keep normal safety checks for high-impact changes.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (4)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
84% confidence
Finding

The skill discusses and encourages file-reading behavior (read_file) but does not declare any explicit tool scope such as permissions or allowed-tools. In agent ecosystems, missing scope declarations can cause overbroad default tool access or make review and enforcement harder, increasing the chance that an agent uses file-read capabilities outside the author’s intended boundaries.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
98% confidence
Finding

The skill claims to teach agents to avoid redundant reads, batch independent calls, and cache results within a session. The sample repeatedly reads src/main.py and repeats the same search_files query for def , while also using separate single-call turns rather than batching independent reads, which conflicts with the stated behavior.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The manifest describes a skill about minimizing tool-call overhead through batching, caching, and budgeting. This sample session demonstrates unrelated operational behavior—editing source code with patch and executing tests via terminal—which goes beyond illustrating tool-economy techniques.

Content

No source excerpt is available for this finding.

Context-Inappropriate Capability

Medium
Category
Not specified by scanner
Confidence
88% confidence
Finding

The sample normalizes shell-based tools (cat, grep, and especially a generic terminal command running python3 -m pytest) in a skill whose stated purpose is only to reduce tool-call overhead. This is dangerous because it can implicitly encourage agents to prefer unrestricted shell execution as a 'single powerful command,' expanding capability beyond the intended scope and increasing the risk of arbitrary command execution if similar patterns are generalized.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.