diff --git a/mcp.go b/mcp.go
index ff3952a..30f037a 100644
--- a/mcp.go
+++ b/mcp.go
@@ -11,7 +11,7 @@ import (
 
 const mcpProtocolVersion = "2024-11-05"
 
-const mcpInstructions = `Grok Build and Claude Code: Start one /loop 5m once per session via the scheduler (scheduler_create on Grok, CronCreate on Claude). Do not ask the user to type /loop. Do not stack duplicate loops. The loop prompt: call gander_list_comments with no path, then follow the comment rules below.
+const mcpInstructions = `Grok Build and Claude Code: The first time this session the user asks to gander a markdown file (preview, share, or gander watch), start one /loop 5m via the scheduler (scheduler_create on Grok, CronCreate on Claude). Do not ask the user to type /loop. Do not stack duplicate loops. The loop prompt: call gander_list_comments with no path, then follow the comment rules below.
 Other agents (Codex, OpenCode, Cursor, etc.): At the start of every turn, call gander_list_comments with no path.
 - The no-path result is metadata only (path, filename, share_url, unresolved_count). Do not fetch bodies for other files unless the user asks to handle that review.
 - If the user's request involves a file that has unresolved comments, call gander_list_comments with that path, then address them before other work: edit the file and/or gander_reply_comment. If watching is false, run gander watch <path> first so the reviewer sees live updates.
diff --git a/mcp_test.go b/mcp_test.go
index bf292ed..784f354 100644
--- a/mcp_test.go
+++ b/mcp_test.go
@@ -50,12 +50,17 @@ func TestMCPInstructionsGrokClaudeLoop(t *testing.T) {
 		"Grok Build and Claude Code",
 		"Other agents",
 		"Do not stack duplicate loops",
+		"first time this session",
+		"gander a markdown file",
 		"At the start of every turn, call gander_list_comments",
 	} {
 		if !strings.Contains(mcpInstructions, want) {
 			t.Errorf("mcpInstructions missing %q", want)
 		}
 	}
+	if strings.Contains(mcpInstructions, "once per session") {
+		t.Fatal("must not start the comment loop at session start")
+	}
 	grok := strings.Index(mcpInstructions, "Grok Build and Claude Code")
 	other := strings.Index(mcpInstructions, "Other agents")
 	if grok < 0 || other < 0 || other <= grok {