New metadata for tools

[tevanburen]

Description

Goes with SEMOSS/Semoss#1983

• Update useLoadingMessage to take an array of custom options
• For auto-executing tools, receive custom loading messages
• When rendering tool UIs, now receive URLs

Changes Made

• Allow useLoadingMessage to use custom messages
• Receive path from portals to display UI for tools
  • If SMSS_MCP_UI is not passed, then preserve legacy logic
• Add displayLocation to SMSS_MCP_UI

How to Test

Test old mcp json

1. Have an mcp json without any SMSS_MCP_UI field
2. Have a custom UI by creating an index.html in /portals
3. Prompt playground for the tool
4. Verify that the custom UI renders
5. Delete index.html and republish
6. Prompt playground for the tool
7. Verify that the default UI renders

Test new mcp json

1. Run Make[Python/Pixel/Engine]MCP
2. Verify that the new MCP json has SMSS_MCP_UI for each tool
3. Prompt playground for the tool
4. Verify that playground renders the default UI, regardless of the presence of index.html
5. For Python add @mcp_ui({ "resourceURI": "/", "loadingMessage": "Custom loading message...", "displayLocation": "sidebar" }) to a function and run MakePythonMCP, or for java pass mcpMetadata=[{ "SMSS_MCP_UI": { "resourceURI": "/", "loadingMessage": "Custom loading message..." } }] to Make[Pixel/Engine]MCP. Try different combinations of each
6. Verify that the new MCP json has SMSS_MCP_UI for each tool with the correct data
7. Prompt playground for a tool with a custom loading message set to auto-execute. Verify that the custom loading message appears
8. Prompt playground for a tool with a custom UI, verify that the custom UI appears
9. Prompt playground for a tool without a custom UI, verify that the default UI appears

Notes

Python decorator:

@mcp_ui({
  "loadingMessage": string;
  "resourceURI": string; // right now, just a path relative to /portal
  "displayLocation": "inline" | "sidebar" | "hidden"; // default is sidebar
})

Pixel arg:

mcpMetadata=[{
  "loadingMessage": string;
  "resourceURI": string; // right now, just a path relative to /portal
  "displayLocation": "inline" | "sidebar" | "hidden"; // default is sidebar
}]

[github-actions]

@CodiumAI-Agent /update_changelog