[Feature/Demo] Implement Auth-Based Tool Access

Can there be demos for allowing users to access different subset of tools + models (for persona/role-based customization) based on their authentication level?

The issue asks for a demo of role-based access to tools and models. First, examine the repository's existing authentication and tool management code. Look for demo directories or examples of tool configuration. Determine how authentication levels are currently defined and how tools are exposed. The goal is to create a sample showing different tool subsets for different user roles.

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