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summarize

Summarize or extract text/transcripts from URLs, podcasts, and local files (great fallback for “transcribe this YouTube/video”).

79

2.63x
Quality

76%

Does it follow best practices?

Impact

87%

2.63x

Average score across 3 eval scenarios

SecuritybySnyk

Advisory

Suggest reviewing before use

Optimize this skill with Tessl

npx tessl skill review --optimize ./nanobot/skills/summarize/SKILL.md
SKILL.md
Quality
Evals
Security

Security

2 findings — 2 medium severity. This skill can be installed but you should review these findings before use.

Medium

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: 0.90). This skill explicitly fetches and ingests content from public URLs and YouTube (see SKILL.md "Summarize" and the quick-start examples), meaning untrusted user-generated third-party content is read and used to produce summaries that could embed instructions influencing the agent's subsequent outputs or actions.

Report incorrect finding
Medium

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 summarize skill fetches arbitrary user-supplied URLs at runtime (e.g., https://example.com and https://youtu.be/dQw4w9WgXcQ) and injects the fetched content into the model prompt/context to produce summaries, meaning remote-hosted content can directly control agent input.

Repository
HKUDS/nanobot
Audited
Security analysis
Snyk

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