Copilot MCP: Tools visible but Prompts not detected (Payload CMS 3.70 MCP server)

[DudeFactory]

We are integrating MCP with GitHub Copilot and running into an issue where MCP tools are detected, but MCP prompts are not.

Environment:
VS Code Insiders (latest)
GitHub Copilot extension (Pre-Release enabled)
MCP enabled
Payload CMS 3.70 MCP server via @payloadcms/plugin-mcp
MCP Inspector (desktop client)

Expected Behavior
Copilot should list and allow invoking MCP prompts via:
Copilot: Open Prompt Library
Copilot chat prompt picker

Actual Behavior
Tools from the MCP server appear correctly in Copilot
Prompts do not appear anywhere in Copilot
MCP Inspector does show all prompts correctly

So the server side looks correct, Copilot partially integrates, but the prompt layer does not.
So the server is definitely advertising prompts per MCP spec.

Troubleshooting Already Done:
Confirmed Pre-Release channel of GitHub Copilot installed
Confirmed settings.json has MCP enabled
Verified no startup errors in Copilot MCP output logs
Verified MCP Inspector can call prompts successfully
Verified MCP Inspector sees both capabilities live (not cached)
Verified tools are usable via Copilot (so transport layer is fine)

Question
Is the MCP prompt UI feature fully rolled out in the current Pre-Release build, or is there an additional requirement for MCP prompt discovery?

Alternatively:
Does Copilot expect a different schema shape for prompts?
Does Copilot only support tools at this stage?
Is there an MCP spec mismatch for the prompt capability that Payload CMS MCP plugin needs to adjust?

If there is current documented support for MCP prompts in Copilot, we’d appreciate guidance on:
Required prompt schema format
Required metadata / registration procedures
Any known limitations for MCP prompts in current builds

Thank you.