fix(gateway_tools,conversations): say refused in user turns, the reply reaches the human itself

src/beaver_gateway/core/conversations.py

@@ -883,6 +883,11 @@ class Conversations:
         self._ensure_worker(cast("int", conv.id))
         return item
 
+    def turn_origin(self, conv: Conversation) -> str | None:
+        """Origin of the running turn (``user``, ``inject``, ...); None when idle."""
+        runner = self._runners.get(cast("int", conv.id))
+        return runner.origin if runner is not None and runner.turn_id else None
+
     async def say(self, conv: Conversation, text: str) -> dict[str, Any]:
         runner = self._runners.get(cast("int", conv.id))
         _log.info("say[%s]: %s", conv.external_id, text[:200])

src/beaver_gateway/core/gateway_tools.py

@@ -26,6 +26,11 @@ __all__ = ["SERVER_NAME", "TOOL_NAMES", "build_tool_server"]
 _log = logging.getLogger("beaver_gateway.core.gateway_tools")
 
 SERVER_NAME = "gateway"
+SAY_IN_USER_TURN = (
+    "not delivered: this turn was started by the human's message, so your "
+    "reply text reaches them by itself - put what you wanted to say into the "
+    "reply instead of repeating it here"
+)
 TOOL_NAMES = ("read_conversation", "spawn", "say", "schedule", "inject", "close_chat")
 
 
@@ -118,11 +123,14 @@ def _tools(conversations: Conversations, key: str) -> list[SdkMcpTool[Any]]:
         "say",
         "Say something to the human in the frontend this conversation is bound "
         "to. The only way an inject-started turn can speak; silence is simply "
-        "not calling it.",
+        "not calling it. Refused in a turn started by the human's own message: "
+        "there your reply text reaches them by itself, so just write the reply.",
         {"text": str},
     )
     async def say(args: dict[str, Any]) -> dict[str, Any]:
         conv = await current()
+        if conversations.turn_origin(conv) == "user":
+            return _error(SAY_IN_USER_TURN)
         await conversations.say(conv, str(args["text"]))
         return _text("ok")