debug-optimize-lcp
Guides debugging and optimizing Largest Contentful Paint (LCP) using Chrome DevTools MCP tools. Use this skill whenever the user asks about LCP performance, slow page loads, Core Web Vitals optimization, or wants to understand why their page's main content takes too long to appear. Also use when the user mentions "largest contentful paint", "page load speed", "CWV", or wants to improve how fast their hero image or main content renders.
89
87%
Does it follow best practices?
Impact
86%
1.75xAverage score across 3 eval scenarios
Advisory
Suggest reviewing before use
Security
1 medium severity finding. This skill can be installed but you should review these findings before use.
W011: Third-party content exposure detected (indirect prompt injection risk)
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
Third-party content exposure detected (high risk: 1.00). The SKILL.md workflow explicitly requires navigating to arbitrary target URLs ("Step 1: `navigate_page` to the target URL") and running page-evaluation snippets (references/lcp-snippets.md "Identify LCP Element" and "Audit Common Issues") that read DOM/network data (e.g., element.outerHTML, resource URLs), which clearly ingests untrusted public web content that could contain instructions affecting subsequent analysis.
- Repository
- ChromeDevTools/chrome-devtools-mcp
- Commit
1b857c9
- Audited
- Security analysis
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.