IssueTriage can now interact with task in YouTrack and it is idempotent

common/youtrack_mcp_client.py

@@ -63,7 +63,25 @@ class YouTrackMCPClient:
         logger.debug("MCP CALL: %s with %s", name, arguments)
         result = await self._call_tool_or_raise(name, arguments)
         logger.debug("MCP RAW RESULT: %s", repr(result)[:500])
-        return result.structured_content or result.content
+        if result.structured_content is not None:
+            return result.structured_content
+
+        # Convert content blocks to JSON-serializable form
+        if result.content:
+            out = []
+            for block in result.content:
+                if getattr(block, "type", None) == "text":
+                    out.append({"type": "text", "text": block.text})
+                else:
+                    # fallback for other block types
+                    out.append({"type": getattr(block, "type", "unknown"),
+                                "data": str(block)})
+            # If it's a single text block, unwrap to plain string
+            if len(out) == 1 and out[0]["type"] == "text":
+                return out[0]["text"]
+            return out
+
+        return None
 
     async def _call_tool_or_raise(self, name: str, arguments: dict):
         try:
@@ -87,4 +105,8 @@ class YouTrackMCPClient:
                 raise IssueNotFound(text)
             raise RuntimeError(f"MCP tool {name} failed: {text}")
 
-        return result
+        return result
+
+    async def list_tools(self):
+        """List all available tools from the MCP server."""
+        return await self._client.list_tools()