diff --git a/mcp/setup.sh b/mcp/setup.sh
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+#!/usr/bin/env bash
+# MCP Server Setup — Timmy's perception and action layer
+# Run once on Hermes (Mac M3 Max) to install both MCP servers.
+# No custom code. pip install and verify.
+
+set -euo pipefail
+
+echo "=== Installing MCP Servers ==="
+
+# 1. steam-info-mcp — game-layer perception (#545)
+pip install steam-info-mcp
+echo "✓ steam-info-mcp installed: $(which steam-info-mcp)"
+
+# 2. mcp-pyautogui — desktop control / execute_action (#546)
+pip install mcp-pyautogui
+echo "✓ mcp-pyautogui installed: $(which mcp-pyautogui)"
+
+echo ""
+echo "=== Verify Steam API Key ==="
+if [ -z "${STEAM_API_KEY:-}" ]; then
+  echo "⚠  STEAM_API_KEY not set."
+  echo "   Get one at: https://steamcommunity.com/dev/apikey"
+  echo "   Then: export STEAM_API_KEY=your-key-here"
+  echo "   Add to ~/.zshrc or ~/.bashrc for persistence."
+else
+  echo "✓ STEAM_API_KEY is set"
+fi
+
+echo ""
+echo "=== Verify macOS Accessibility Permissions ==="
+echo "mcp-pyautogui needs Accessibility permissions to control mouse/keyboard."
+echo "System Settings → Privacy & Security → Accessibility"
+echo "Add Terminal (or whatever runs the heartbeat loop)."
+
+echo ""
+echo "=== Quick Smoke Test ==="
+echo "Test steam-info-mcp:"
+echo "  echo '{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"tools/list\"}' | steam-info-mcp"
+echo ""
+echo "Test mcp-pyautogui:"
+echo "  echo '{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"tools/list\"}' | mcp-pyautogui"
+echo ""
+echo "Both should return JSON with available tools."
+echo "=== Done ==="