chatlog_mcp: sharper tool descriptions to stop Gemini halting after list_chats

- list_chats output now ends with an explicit instruction to call
  chatlog_recent / chatlog_since next (Gemini 2.5 Flash tends to answer
  after a single tool call otherwise)
- list_chats description: clarify it only returns metadata, never content
- recent description: marked as PREFERRED for reading actual messages

mac-clients/chatlog_mcp.py

@@ -68,6 +68,15 @@ def _format_chats(payload: dict) -> str:
             f"- {c.get('title') or '(ohne Titel)'} "
             f"(id={c['chat_id']}, {c['message_count']} Nachrichten)"
         )
+    lines.append("")
+    lines.append(
+        "WICHTIG: Diese Liste enthaelt nur Metadaten (Titel + Anzahl). "
+        "Um die NACHRICHTEN selbst zu sehen, MUSST du jetzt zwingend einen "
+        "zweiten Tool-Call machen: chatlog_recent(chat='<titel-substring>') "
+        "fuer die letzten Nachrichten ODER "
+        "chatlog_since(chat='<titel-substring>', hours=24) fuer alles seit "
+        "den letzten 24h. Antworte NICHT bevor du das gemacht hast."
+    )
     return "\n".join(lines)
 
 
@@ -127,10 +136,12 @@ TOOLS = [
     {
         "name": "chatlog_list_chats",
         "description": (
-            "List every Telegram group that the Arakawa Concierge logger "
-            "is currently recording. Returns the chat title, internal id "
-            "and message count. Always call this first when you don't yet "
-            "know which group the user is asking about."
+            "Returns ONLY the metadata (title, id, message count) of every "
+            "Telegram group being recorded. Does NOT contain any messages. "
+            "Use this only when you don't know which group the user means. "
+            "After calling this you MUST make a second call to chatlog_recent "
+            "or chatlog_since to actually read the messages — the user "
+            "wants the conversation content, not just chat titles."
         ),
         "inputSchema": {
             "type": "object",
@@ -141,10 +152,15 @@ TOOLS = [
     {
         "name": "chatlog_recent",
         "description": (
-            "Return the most recent messages of a recorded Telegram group "
-            "as a chronological transcript. Use this for questions like "
-            "'Was wurde zuletzt geschrieben?' or 'Aktueller Stand?'. "
-            "If 'chat' is omitted, returns recent messages across all groups."
+            "PREFERRED tool to actually READ the latest messages of a "
+            "recorded Telegram group. Returns a chronological transcript "
+            "with timestamps, senders and full message bodies. Use this "
+            "for: 'Was wurde heute / zuletzt geschrieben?', 'Aktueller "
+            "Stand im <Gruppe>-Chat?', 'Was hat <Person> gesagt?'. "
+            "If you don't know the chat title, call chatlog_list_chats "
+            "first and then ALWAYS follow up with this tool. "
+            "If 'chat' is omitted, returns recent messages across all "
+            "groups (works fine when only one group is recorded)."
         ),
         "inputSchema": {
             "type": "object",