investigate

MEDIUM W011: Third-party content exposure detected (indirect prompt injection risk).

• Third-party content exposure detected (high risk: 1.00). The skill explicitly fetches and summarizes user-generated Slack threads (Step 1.1a: mcp__claude_ai_Slack__slack_read_thread / slack_read_channel) and uses that content to build the Phase 1 summary which directly drives Phase 2 searches and actions, so untrusted third-party messages could inject instructions that influence subsequent tool use.