docs: improve package description

Author: O2eg

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "pg-play"
 version = "0.2.0"
-description = "PostgreSQL experiment orchestrator"
+description = "MCP orchestrator for reproducible PostgreSQL performance experiments"
 readme = "README.md"
 requires-python = ">=3.10"
 license = "MIT"