[Feature Request] MCP Tool Output Verbosity Control

Bug Description
Feature Request: MCP Tool Output Verbosity Control

I'd like the ability to control how MCP tool results are displayed in Claude Code output.

Current behavior:

• MCP tool results are shown in full, which can be very verbose (10k+ tokens for semantic search results)
• This creates noise in the terminal and makes it harder to follow the conversation

Requested feature:

• A setting to control MCP output verbosity, e.g.:
• "full" - show complete results (current behavior)
• "summary" - show only counts/metadata (e.g., "Found 15 results in 234ms")
• "collapsed" - show summary with option to expand
• "hidden" - don't display MCP results in terminal (Claude still processes them)

Example setting in settings.json:
{
"mcpOutputVerbosity": "summary"
}

Use case:
I'm using a custom MCP server for semantic code search that returns code chunks. The results are useful for Claude but clutter my terminal. I want Claude to use the full data while showing me a cleaner output.

Environment Info

• Platform: darwin
• Terminal: rider
• Version: 2.0.55
• Feedback ID: d80017c3-8ec0-47cd-8ab0-06fb3f96e9bd

Errors

[]