Summary by cubic

Read tool descriptions and parameter schemas from the registry manifest and validate the schema shape to avoid importing action modules. Fixes tool creation for custom/git-synced UDF actions and prevents invalid tools from malformed manifests.

• Bug Fixes
  • Use manifest.interface.expects for parameters and require a valid JSON Schema (must include 'type' or 'properties'); raise a clear error if malformed.
  • Removed _extract_action_metadata and related tests; create_tool_from_registry now reads description and schema directly from the manifest.

^{Written for commit f9f93ac. Summary will update on new commits.}