fix(mcp): trim server.json descriptions under the registry 100-char cap

[plind-junior]

the mcp registry rejects a server.json whose description or a package environmentVariables[].description exceeds 100 chars with a 422. #410 shipped 112- and 162-char strings; trim both so mcp-publisher publish clears schema validation. no functional change — same server, shorter metadata.

Summary by CodeRabbit

• Documentation
  • Updated the product description text to use clearer, more user-friendly wording.
  • Clarified the VOUCH_KB_PATH environment variable so it’s easier to understand where the .vouch directory is found when the setting is not provided.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 637ba209-39f9-465a-86fb-0642026df806

📥 Commits

Reviewing files that changed from the base of the PR and between 5ef0335 and d6b29df.

📒 Files selected for processing (1)

• server.json

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📝 Walkthrough

Walkthrough

This change updates descriptive text in server.json, including the top-level description wording and the VOUCH_KB_PATH environment variable description clarifying its reference to the .vouch directory and cwd walk-up behavior.

Changes

Description Text Updates

Layer / File(s)	Summary
Update description strings server.json	Top-level description and VOUCH_KB_PATH environment variable description text are reworded for clarity.

Estimated code review effort: 1 (Trivial) | ~2 minutes

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/mcp-registry-desc-limit

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