Add a toast on connection error #765
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Motivation and Context
When failing to connect to an MCP server, its very hard to understand why. There is only an opaque "Connection Error" message with no additional info. This also doesn't change at all on repeated attempts, so there is no indication we attempted again and failed.
This change introduces a
toast
to visualize the error, and adds thecause
into the error message for further debuggingHow Has This Been Tested?
Manually tested

Breaking Changes
No
Types of changes
Checklist
Additional context