Three tools with complete schemas and basic descriptions, but significant gaps in parameter documentation, output schema clarity, and error handling. Tool names lack action verbs (keyword_difficulty, opportunity_score, content_brief are noun-heavy). No parameter descriptions at all, LLMs cannot infer what 'keywords' array should contain or what 'difficulty' and 'monthly_volume' represent. Output schemas are undocumented; responses are JSON-stringified text blobs rather than structured objects. No error handling, validation, or recovery guidance. Descriptions are adequate length (50-100 chars) but lack WHEN/WHY context. This is a typical community server with functional but incomplete definitions.

• Rename tools with action verbs: 'estimate_keyword_difficulty', 'calculate_opportunity_score', 'generate_content_brief'. This makes intent clear from the name alone.
• Add descriptions to every parameter. Example: 'keywords (array of strings): List of search terms to analyze. Each keyword should be 1-5 words. Required.'
• Document output schemas. Instead of returning JSON-stringified text, return structured objects with typed fields. Example: keyword_difficulty returns [{keyword: string, difficulty: number (0-100)}].
• Add input validation and error messages. Validate keywords array is non-empty, difficulty is 0-100, volume is non-negative. Return actionable errors like 'difficulty must be 0-100, got 150'.
• Expand tool descriptions with WHEN/WHY context. Example: 'Use this to estimate SEO difficulty before content planning. Returns 0-100 score based on SERP signals. Call before opportunity_score.'