Ask Mercado Libre visits for one listing, cap Printify product pages at 50 - #1578

Summary

Two catalog tool definitions told the model something the vendor no longer accepts. Found in the Cloud tool errors of 7-8 Nov 2026.

• mercado_libre_get_item_visits said "one or more listings" and gave a comma-separated example. Mercado Libre now answers 400 "maximum amount of items to query is 1" (2 calls, 1 workspace).
• printify_list_products said "1-50" in the text but had no bounds in the schema. Printify answered 400 "limit may not be greater than 50" (1 call).

Changes

• br/mercado-libre.json: description and ids now say one listing id per call, with the vendor's wording.
• intl/printify.json: limit gets minimum: 1, maximum: 50, so clients see the bound in the schema.

Description-only for Mercado Libre (auto-synced at boot); the Printify schema bound reaches installed connectors with "Apply update". Same on Cloud and self-hosted.

Type

• Bug fix

Testing

• Added/updated unit tests: no new test; the static adapter specs cover both files.

From the repository root and packages/backend:

• node scripts/validate-adapters.mjs --warn: no warning for either adapter.
• node scripts/regenerate-catalog.mjs: no diff in catalog.ts.
• node scripts/adapter-count.mjs --check: OK (714 adapters, unchanged).
• npx jest --maxWorkers=4 src/adapters/catalog src/adapters/intl/printify src/adapters/br/mercado-libre src/mcp-server/error-hints: 8 suites passed, 15,727 tests passed, 3 skipped (live tests).

Checklist

• My code follows the existing code style
• I have tested my changes locally
• I have updated documentation (if applicable): not applicable
• All existing tests pass: full suite in CI
• This PR has a descriptive title

Related Issues

Found in the 2026-11-08 daily check (Cloud tool errors).