markitdown
Convert files and office documents to Markdown. Supports PDF, DOCX, PPTX, XLSX, images (with OCR), audio (with transcription), HTML, CSV, JSON, XML, ZIP, YouTube URLs, EPubs and more.
74
66%
Does it follow best practices?
Impact
85%
3.40xAverage score across 3 eval scenarios
Advisory
Suggest reviewing before use
Optimize this skill with Tessl
npx tessl skill review --optimize ./scientific-skills/markitdown/SKILL.mdSecurity
2 findings — 2 medium severity. 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: 0.80). MarkItDown explicitly ingests public, user-generated content — e.g., SKILL.md and examples show converting YouTube URLs (md.convert("https://www.youtube.com/watch?v=VIDEO_ID")) and web/HTML content — so untrusted third‑party transcripts/pages are fetched and returned as text that downstream LLMs or automation could read and influence subsequent actions.
W012: Unverifiable external dependency detected (runtime URL that controls agent)
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
Potentially malicious external URL detected (high risk: 0.90). The skill calls the OpenRouter API at runtime (https://openrouter.ai/api/v1) to generate images and to obtain review critique which is then injected into and used to modify subsequent prompts/decisions (e.g., improve_prompt/regeneration), so remote content directly controls agent prompts and is required for those AI-enhanced features.
- Repository
- K-Dense-AI/claude-scientific-skills
- Commit
25e1c0f
- 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.