Add missing capabilities and improve connection handling for server-redis

[olaservo]

Description

This PR adds the missing tools capability and improves connection and error handling for the reference Redis MCP server.

Server Details

• Server: server-redis

Motivation and Context

Was not able to start or use server-redis tools. After adding missing capabilities, if there was no redis host running then Claude Desktop got spammed with error logs.

How Has This Been Tested?

Tested with Claude Desktop on Windows with Memurai, screenshots below:

Breaking Changes

None

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

This should also solve this issue since the typescript changes should trigger a new tag and npm version to get published: #856

[tadasant]

Nice! Thanks for digging into this!