feat: add MCP server for AI integration

[joshrotenberg]

Summary

Add a new redisctl-mcp crate that provides a Model Context Protocol (MCP) server enabling AI assistants like Claude to manage Redis deployments.

Closes #475

What's Included

Phase 1: Read-Only Tools + Database Create

Cloud Tools (7 read-only):

• cloud_account_get - Get account information
• cloud_subscriptions_list - List all subscriptions
• cloud_subscription_get - Get subscription details
• cloud_databases_list - List databases in a subscription
• cloud_database_get - Get database details
• cloud_tasks_list - List recent async tasks
• cloud_task_get - Get task status

Enterprise Tools (10 read-only + 1 write):

• enterprise_cluster_get - Get cluster information
• enterprise_nodes_list - List all cluster nodes
• enterprise_node_get - Get node details
• enterprise_databases_list - List all databases
• enterprise_database_get - Get database details
• enterprise_database_stats - Get database statistics
• enterprise_shards_list - List all shards
• enterprise_alerts_list - List active alerts
• enterprise_logs_get - Get cluster event logs
• enterprise_license_get - Get license information
• enterprise_database_create - Create a new database (write)

Usage

# Start MCP server (read-only mode, default)
redisctl -p my-profile mcp serve

# Enable write operations
redisctl -p my-profile mcp serve --allow-writes

# List available tools
redisctl mcp tools

Claude Desktop Configuration

{
  "mcpServers": {
    "redisctl": {
      "command": "/path/to/redisctl",
      "args": ["-p", "my-profile", "mcp", "serve"]
    }
  }
}

Other Changes

• Documentation: Added docs/src/integrations/mcp.md with full usage guide
• Bug fix: Changed search and timeseries fields in redis-enterprise crate from Option<bool> to Option<Value> to handle API responses that return objects

Testing

Tested with live Redis Enterprise cluster:

• All read tools work correctly
• Database creation works via MCP
• Read-only mode properly blocks write operations

Next Steps (Future PRs)

• Add more write operations (delete, update)
• Add Cloud write operations
• Add resource support for prompts/context

[joshrotenberg]

Superseded by #531 which includes all MCP functionality