Improve error messages in hooks

**Description**
Currently api lacks proper serialization support.

**Proposed solution**
Add configurable serialization with sensible defaults.

**Priority**: Low/Medium

Start by locating the API and hook implementations, then trace how hook data is currently serialized. Define the configurable serialization behavior and its defaults from the issue requirements, and add or update tests to cover them. Done means the API supports configurable serialization with sensible defaults.

Written by the indexing model from the issue text.