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Grok+17 agentsAgentShield — AI Skill & MCP Security Scanner
Static security scanner for MCP servers and AI skills to detect over-privileged permissions, secrets, and code risks.
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AgentShield — AI Skill & MCP Security Scanner
Example session with this skill installed
Scan the new mcp-server-sqlite directory I just downloaded for security risks before I add it to my Claude config.
- Read your context and instructions
- Compiled the agentshield
- Generated the document
I have completed the static security analysis of the mcp-server-sqlite directory. The scan identified 4 findings across tool schemas and configuration files.
Security Analysis Report: mcp-server-sqlite
| Severity | Rule ID | File | Evidence | Recommendation |
|---|---|---|---|---|
| HIGH | EXEC-01 | server.py:42 | subprocess.run(user_input, shell=True) | Remove shell execution; use parameterized queries for DB operations. |
| MEDIUM | NET-02 | mcp-config.json | allowed_hosts: ["*"] | Restrict network access to specific local or trusted DB endpoints. |
| LOW | FS-01 | schema.json | write_access: true | Verify if the skill requires write permissions for your specific use case. |
| INFO | SEC-05 | .env.example | DB_PASSWORD=... | Ensure actual credentials are not committed to version control. |
Permissions & Capabilities Summary
- Filesystem: Read/Write access detected in specific working directory.
- Network: Unrestricted host access configured in JSON manifest.
- System: Ability to spawn shell processes (High Risk).
- Secrets: No active secrets leaked; template keys found.
Risk Assessment
- Overall Risk: HIGH
- Findings: 1 High, 1 Medium, 1 Low, 1 Info.
- Status: Baseline match failed (New Installation).
Next steps
- Refactor
server.pyto removeshell=Truebefore running the server. - Update the
mcp-config.jsonto whitelist onlylocalhostor specific database IPs. - Run the scan again after applying fixes to verify the risk reduction.
agentshield-ai-skill-mcp-security-scanne.pdf
PDF · document
Example file from a real run - the skill writes it into your workspace.
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What you get
About this skill
Running untrusted AI skills or MCP servers on your local machine is a significant security risk. This skill performs defensive static analysis to identify vulnerabilities, over-privileged permissions, and malicious patterns before you install new agent capabilities.
What it does
- Permission Auditing identifies excessive filesystem, network, and environment variable access.
- Secret Detection flags hardcoded credentials or dangerous secret-handling patterns without exposing the values.
- Injection Analysis scans for prompt injection indicators and suspicious instructions inside agent assets.
- Execution Risk detects shell command execution, hidden scripts, and arbitrary code patterns.
- Supply Chain Review evaluates tool schemas and MCP configurations for external dependencies and risks.
How it works
- Point the agent to an AI skill directory, MCP config file, or tool schema.
- The skill performs a static scan of the assets, scripts, and configuration files.
- It categorizes findings by severity from Low to Critical with specific evidence.
- You receive a structured security report including a permissions summary and remediation steps.
Frameworks & tools
This skill works with MCP (Model Context Protocol) servers, JSON tool schemas, Python/Node.js agent scripts, and standard configuration files like mcp-config.json.
Why this beats prompting it yourself
Manual inspection often misses subtle permission overlaps or obfuscated shell commands. This skill uses a structured risk model and mandatory reporting format to ensure every capability is explicitly accounted for and categorized by threat level.
Use cases
- Auditing a third-party MCP server before adding it to your Claude Desktop config.
- Reviewing a downloaded AI skill from a marketplace for hidden network calls.
- Checking local agent scripts for hardcoded API keys or wide file-system write access.
- Benchmarking a new version of a tool against a known secure baseline.
Known limitations
Static analysis cannot guarantee the detection of all runtime malware or dynamic execution paths. It does not execute code or connect to endpoints to verify behavior.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
Free skills download straight away. Paid skills unlock right after purchase.
- 2
Unzip into your skills folder
Every agent reads skills from one folder on your machine. Drop the unzipped folder in there.
- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
Skills folder by agent
Click the path to copy it. Create the folder if it does not exist yet.
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