1msg
1msg integration. Manage data, records, and automate workflows. Use when the user wants to interact with 1msg data.
52
58%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Advisory
Suggest reviewing before use
Optimize this skill with Tessl
npx tessl skill review --optimize ./skills/1msg/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: 0.90). The skill explicitly fetches and proxies external, user-generated messaging data (e.g., "Get Messages") and allows arbitrary API proxying via "membrane request /path/to/endpoint", and the connection flow can return clientAction.agentInstructions (in SKILL.md under "CLIENT_ACTION_REQUIRED") which the agent is expected to read and act on, so untrusted third-party content can influence agent behavior.
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: 0.80). The skill uses the Membrane CLI to call the 1msg API (e.g., https://1msg.io/ and https://1msg.io/api/) at runtime and the connection response can include clientAction.agentInstructions which would directly supply instructions to the agent, so remote content from that URL can control agent prompts.
- Repository
- membranedev/application-skills
- Commit
f484c82
- 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.