Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With zero schema coverage, the description needed to explain the project_id parameter, but the parameter name is self-explanatory. The description provides context on how the parameter's value is used (the project that gets deleted, and its scope semantics), which adds meaning beyond the bare schema. It doesn't explicitly restate that project_id is the identifier, but the surrounding text makes it implicit, so a small deduction is warranted.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.