Function register_skill_tools_with_context 

pub fn register_skill_tools_with_context(
    tools_registry: &mut Vec<Box<dyn Tool>>,
    skills: &[Skill],
    security: Arc<SecurityPolicy>,
    unfiltered_registry: &[Arc<dyn Tool>],
)

Register skill-defined tools with full context for builtin kinds.

unfiltered_registry provides the pre-policy tool list for kind = "builtin" delegation.