# Version discard tool, dataset descriptions, and transport compatibility fixes

**Version:** v2.13.0

**Published:** February 13, 2026

## New Features

- **version_discard tool.** New tool for removing document versions from a release, split out from `discard_drafts` for a clearer API.
- **Dataset descriptions.** `create_dataset`, `update_dataset`, and `list_datasets` now support a `description` field.

## Improvements

- **System prompt.** Added guidance directing agents to use `search_docs` and `read_docs` tools for accessing Sanity documentation instead of web searches.

## Fixes

- **MCP transport compatibility.** Fixed an issue where clients sending `params: null` in JSON-RPC notifications (e.g. Claude Code, Cursor) would receive errors.
- **get_schema tool.** Fixed an error that occurred when a schema type has a `preview` field with a `null` `select` value.
- **get_schema tool.** Improved error message when an unknown type name is provided to now list valid type names.

## Removals

- **Release management tools.** Removed tools for managing releases. Releases can still be managed through Sanity Studio or the HTTP API.