Skip listing tools that aren't valid ToolDefinitions (#340)

The tool used in the mcp demo isn't a valid ToolDefinition.

Unable to list tool 'Demo.lorem': 1 validation error for ToolDefinition
requirements Input should be a valid dictionary or
instance of ToolRequirements For further information visit
https://errors.pydantic.dev/2.10/v/model_type

arcade/arcade/cli/utils.py

@@ -17,6 +17,7 @@ from openai import OpenAI, Stream
 from openai.types.chat.chat_completion import Choice as ChatCompletionChoice
 from openai.types.chat.chat_completion_chunk import ChatCompletionChunk
 from openai.types.chat.chat_completion_chunk import Choice as ChatCompletionChunkChoice
+from pydantic import ValidationError
 from rich.console import Console
 from rich.live import Live
 from rich.markdown import Markdown
@@ -201,7 +202,11 @@ def get_tools_from_engine(
     try:
         page_iterator = client.tools.list(toolkit=toolkit or NOT_GIVEN)
         for tool in page_iterator:
-            tools.append(ToolDefinition.model_validate(tool.model_dump()))
+            try:
+                tools.append(ToolDefinition.model_validate(tool.model_dump()))
+            except ValidationError:
+                # Skip listing tools that aren't valid ToolDefinitions
+                continue
     except APIConnectionError:
         console.print(
             f"❌ Can't connect to Arcade Engine at {base_url}. (Is it running?)", style="bold red"