def unhide_tool(self, context_name, tool_name):
        """Unhide a tool so that it may be exposed in a suite.

        Note that unhiding a tool doesn't guarantee it can be seen - a tool of
        the same name from a different context may be overriding it.

        Args:
            context_name (str): Context containing the tool.
            tool_name (str): Name of tool to unhide.
        """
        data = self._context(context_name)
        hidden_tools = data["hidden_tools"]
        if tool_name in hidden_tools:
            hidden_tools.remove(tool_name)
            self._flush_tools()