feat(mcp): add profile creation tool with elicitation support

[joshrotenberg]

Summary

Add a profile_create tool to MCP that allows users to create profiles directly through the agent, without needing to use the CLI first.

Motivation

Current state requires users to:

1. Install redisctl CLI
2. Run redisctl profile create ...
3. Then use MCP

For a true "zero friction" experience (especially with Docker), users should be able to:

1. Start MCP
2. Ask: "Help me set up a connection to my Enterprise cluster"
3. Agent guides them through credential collection
4. Profile is created

Proposed Implementation

New Tool: profile_create

pub struct CreateProfileInput {
    pub name: String,
    pub profile_type: String,  // "cloud", "enterprise", "database"
    
    // Cloud credentials
    pub api_key: Option<String>,
    pub api_secret: Option<String>,
    
    // Enterprise credentials
    pub enterprise_url: Option<String>,
    pub enterprise_user: Option<String>,
    pub enterprise_password: Option<String>,
    pub enterprise_insecure: Option<bool>,
    
    // Database credentials
    pub host: Option<String>,
    pub port: Option<u16>,
    pub password: Option<String>,
    pub tls: Option<bool>,
}

MCP Elicitation

MCP supports elicitation for collecting sensitive information from users. This could be used to:

1. Prompt for credentials securely
2. Not expose secrets in conversation history
3. Provide a guided setup flow

Need to check tower-mcp support for elicitation.

Security Considerations

• Credentials will be stored in the config file (same as CLI)
• Consider keyring integration for sensitive values
• Mask credentials in any output/logging
• Require --read-only=false for this tool

Alternative: Environment Variables

For Docker/container scenarios, could also support:

• "Create a profile from environment variables"
• Reads REDIS_CLOUD_API_KEY, REDIS_ENTERPRISE_URL, etc.
• Creates profile automatically

Related

• docs(mcp): add Cloud and Enterprise quickstart walkthroughs #645 - MCP quickstart walkthroughs
• docs: Docker as zero-install MCP option #647 - Docker as zero-install MCP option