All 4 tools have schemas and descriptions, but quality is inconsistent. Tool names lack action verbs (discover_backlinks, find_expired, check_domain, competitor_gap are acceptable but not ideal). Descriptions are present (avg ~150 chars) but lack WHEN/WHY guidance. Parameters have types and descriptions, but lack constraints (enums, ranges, patterns). Output schemas are not documented, responses are JSON blobs without field definitions. Error handling is minimal (try/catch with silent failures). No tool annotations (readOnlyHint, idempotentHint). The code shows silent error suppression (catch {} blocks) which prevents LLMs from understanding failure modes.

• Document output schemas for each tool. E.g., discover_backlinks returns {domain: string, total: number, indexes_searched: number, backlinks: [{source_url, timestamp, status, mime, index}]}. This enables LLMs to extract and chain data.
• Replace silent catch {} blocks with explicit error returns. E.g., 'Common Crawl API timeout (15s). Try again in 30 seconds.' or 'Domain check failed: ENOTFOUND. Domain may be expired or DNS misconfigured.'
• Add min/max constraints to numeric parameters. E.g., limit: {type: 'number', minimum: 1, maximum: 100, default: 50}. Add maxItems to arrays: keywords: {type: 'array', maxItems: 5, items: {type: 'string'}}.
• Enhance descriptions with WHEN/WHY. E.g., 'Use discover_backlinks to find external sites linking to your domain. Call this BEFORE competitor_gap to establish your baseline backlink profile. Returns up to 100 results per index.'
• Add tool annotations in ListToolsRequestSchema response. Set readOnlyHint: true for all tools (they only query, never modify). Set idempotentHint: true (repeated calls with same input return same results).