slack-automation
Automate Slack messaging, channel management, search, reactions, and threads via Rube MCP (Composio). Send messages, search conversations, manage channels/users, and react to messages programmatically.
81
72%
Does it follow best practices?
Impact
97%
1.42xAverage score across 3 eval scenarios
Advisory
Suggest reviewing before use
Optimize this skill with Tessl
npx tessl skill review --optimize ./plugins/all-skills/skills/slack-automation/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). This skill reads and acts on user-generated Slack content (e.g., via SLACK_SEARCH_MESSAGES, SLACK_FETCH_MESSAGE_THREAD_FROM_A_CONVERSATION, and SLACK_FETCH_CONVERSATION_HISTORY as required in the Search and React workflows), so untrusted third-party messages could influence tool decisions and enable indirect prompt injection.
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 explicitly requires connecting to and calling the MCP endpoint https://rube.app/mcp at runtime (e.g., "Always call RUBE_SEARCH_TOOLS first") to fetch tool schemas that directly determine agent instructions and available actions, making it a required external dependency that can control the agent.
- Repository
- davepoon/buildwithclaude
- Commit
7cc63f3
- 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.