Function register_eager_mcp_tool_if_allowed 

pub fn register_eager_mcp_tool_if_allowed(
    wrapper: Arc<dyn Tool>,
    tools: &mut Vec<Box<dyn Tool>>,
    delegate_handle: Option<&Arc<RwLock<RawRwLock, Vec<Arc<dyn Tool>>>>>,
    policy: Option<&ToolAccessPolicy>,
) -> bool

Register an eager MCP tool wrapper into tools (and the delegate handle, when present) only if policy admits it. Returns true when the tool was registered, false when the policy dropped it.