Feedback: /runtime/reference/deno_json/ - Needs Improvement

## Documentation Feedback

**Path:** [/runtime/reference/deno_json/](https://docs.deno.com/runtime/reference/deno_json/)
**Helpful:** No ❌

**Feedback:**
> Explain how named permission sets interoperate with individual permissions: do they widen them? Narrow them? Does the last permission overwrite all previous ones?

**GitHub User:** @tredondo

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*This issue was automatically created from the documentation feedback system.*

Start with the documentation page at /runtime/reference/deno_json/ and review how named permission sets and individual permissions are described. Verify their precedence and interaction, then update the page so it clearly explains whether permissions widen, narrow, or overwrite one another; done means the documented behavior answers each question in the feedback.

Written by the indexing model from the issue text.