Update Agent class's update method to support optional parameters

- Modified the `update` method in the `Agent` class to accept optional parameters for `name`, `system_prompt`, and `mcp_tools`, enhancing flexibility in agent property updates.
- Adjusted internal logic to handle cases where `mcp_tools` is not provided, improving robustness in tool management.

sdk/kortix/agent.py

@@ -18,12 +18,12 @@ class Agent:
 
     async def update(
         self,
-        name: str,
-        system_prompt: str,
-        mcp_tools: list[KortixTools] = [],
+        name: str | None = None,
+        system_prompt: str | None = None,
+        mcp_tools: list[KortixTools] | None = None,
     ):
-        agentpress_tools = {}
-        custom_mcps: list[CustomMCP] = []
+        agentpress_tools = {} if mcp_tools else None
+        custom_mcps: list[CustomMCP] = [] if mcp_tools else None
         for tool in mcp_tools:
             if isinstance(tool, AgentPressTools):
                 agentpress_tools[tool] = AgentPress_ToolConfig(