fix(yoast): advertise noindex as a single boolean type, not [boolean, null]

[dallinchase]

Problem

yoast_update_seo and yoast_bulk_update_seo advertise noindex in their input schema as:

noindex: { type: ['boolean', 'null'], ... }

Anthropic's tool-schema validator (Claude Code, Claude Desktop, and the Anthropic API tool-use endpoint) rejects a "null" member inside a JSON Schema type array. Because tools are validated as a set, this doesn't just disable the noindex field — it returns a 400 for the entire tools/list response, so every tool on the Block MCP server becomes unavailable to Anthropic clients. The server effectively goes dark for Claude users, with an error that points at schema validation rather than this one field.

Fix

Advertise the single scalar type:

noindex: { type: 'boolean', ... }

The runtime handler is unchanged — it still accepts an explicit null (input.noindex === null), so the tri-state semantics (true = noindex / false = explicit index / null = clear to post-type default) are fully preserved. Only the advertised schema drops the rejected null member. Callers that want the default behavior can omit the field or pass null.

Tests

• Existing noindex tri-state: null is preserved test still passes — confirms behavior is unchanged.
• Added a regression test asserting no field in the shared YOAST_FIELD_PROPERTIES set advertises a type array containing "null".

✓ src/__tests__/tools/yoast/yoast_update_seo.test.ts (11 tests)

Note on dist/

dist/index.cjs is a build artifact (npm run build / the prepare hook) and is intentionally left out of this PR to keep the diff reviewable. It will regenerate on install/release.

Repro

Connect Block MCP to any Anthropic client with Yoast SEO active on the target site and request tools/list — it returns a 400 validation error citing the null type member, and no tools load. With this change, tools/list succeeds.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Tests

  • Added regression test for Yoast SEO schema validation.

• Refactor

  • Standardized noindex field type in Yoast SEO tool schema.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e3240c0f-c0a3-4fd4-9cac-605ee37ecca4

📥 Commits

Reviewing files that changed from the base of the PR and between 5eb1a14 and 78e91c1.

📒 Files selected for processing (2)

• src/__tests__/tools/yoast/yoast_update_seo.test.ts
• src/tools/yoast.ts

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Walkthrough

The noindex field schema in YOAST_FIELD_PROPERTIES is changed from a boolean | null union type to a single boolean type, with the description updated accordingly. A regression test is added to assert that noindex.type === 'boolean' and that no other schema property uses a type array containing "null".

Changes

Yoast noindex Schema Fix

Layer / File(s)	Summary
noindex schema narrowed to boolean, with regression test src/tools/yoast.ts, src/__tests__/tools/yoast/yoast_update_seo.test.ts	YOAST_FIELD_PROPERTIES.noindex type changed from boolean|null to boolean and its description updated. A new regression test asserts noindex.type === 'boolean' and verifies no schema property uses a type array containing "null".

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically summarizes the main change: fixing the yoast tool's noindex field schema from a type array to a single boolean type.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

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