MCP server does not register fetch_blob/upload_blob tools despite experimental=true

Summary

The WorkIQ MCP server (v0.5.0-preview3, build 0.5.0.26793) does not expose fetch_blob or upload_blob as MCP tools, even though:

1. The CLI binary supports both commands (workiq fetch-blob --help works)
2. experimental=true is set in config
3. The plugin README and SKILL.md document them as part of the "11 MCP tools" surface
4. The skill references (fetch-blob-work-iq.md, upload-blob-work-iq.md) describe them as MCP tools

Repro

1. Install workiq-preview plugin (/plugin install workiq-preview@work-iq)
2. Ensure workiq config set experimental=true
3. Start MCP server and send tools/list — only 12 tools are returned:
   • accept_eula, ask, list_agents, delete_entity, get_debug_link, do_action, create_entity, get_schema, search_paths, call_function, fetch, update_entity
4. fetch_blob and upload_blob are missing

Expected

tools/list should include fetch_blob and upload_blob when experimental=true.

Workaround

Use the CLI commands directly:

npx -y @microsoft/workiq@preview fetch-blob --url "/me/drive/items/{id}/content" --output ./downloads
npx -y @microsoft/workiq@preview upload-blob --help

Environment

• OS: Windows 11 (win_x64)
• WorkIQ version: 0.5.0.26793 (@microsoft/workiq@0.5.0-preview3)
• Node: v24.13.1
• Copilot CLI

Start by reproducing the MCP tools/list response after setting experimental=true, then compare the registered tools with the plugin README, SKILL.md, and the fetch-blob-work-iq.md and upload-blob-work-iq.md references. Done means fetch_blob and upload_blob appear in tools/list under the stated configuration while the existing CLI commands remain available.