538b67e57d
Adds a comprehensive instructions block to the FastMCP server covering the data model hierarchy, valid enum values, tag format, integer-or-none conventions, when to use fable_send_message vs direct CRUD tools, and admin key requirements. All tool docstrings expanded with full argument descriptions, valid values, and return shape notes. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>