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app.py

@@ -92,7 +92,7 @@ LOCAL_TOOLS = [
 ]
 
 
-RETRY_DELAYS = (0.5, 1.5, 3.0)  # some MCP servers need a beat after the initialize
+RETRY_DELAYS = (0.5, 1.5, 3.0, 5.0, 8.0)  # some MCP servers need a beat after the initialize
                                  # handshake before they'll serve a real request --
                                  # without this, list_tools/call_tool can race and raise
                                  # "Session terminated" on an otherwise-healthy server.
@@ -175,7 +175,8 @@ async def call_tool(name: str, arguments: dict) -> tuple[str, str | None]:
                     return text[:MAX_TOOL_RESULT_CHARS], None
         except Exception as e:  # noqa: BLE001
             last_err = e
-    return f"عذرًا، حدث خطأ أثناء تنفيذ الطلب: {last_err}", None
+    print(f"tool call '{name}' failed after {len(RETRY_DELAYS)} attempts: {last_err}")
+    return "تعذّر الوصول إلى مصدر المعلومة حالياً، يرجى المحاولة مرة أخرى بعد قليل.", None
 
 
 def parse_tool_call(text: str) -> dict | None: