Single tool 'execute_skill_action' has a basic schema and generic description. The tool name lacks a clear action verb (execute_skill_action is vague, does it create, update, query, or transform?). Description (95 chars) is below the 194-char baseline and does not explain WHEN to use it, WHAT it returns, or any prerequisites. Input schema has only one parameter with minimal context. No output schema is documented, LLMs cannot predict what fields to expect. No error handling guidance. The server is STDIO-only, which caps protocol readiness at 50 regardless of definition quality.

• Rename tool to a verb_noun pattern that reflects the actual operation. If it ranks code completions, use 'rank_code_completions'. If it validates AST, use 'validate_ast_syntax'. The name must convey intent without reading the description.
• Expand description to 150 - 250 characters. Include: (1) what the tool does, (2) when to call it instead of alternatives, (3) what it returns, (4) any prerequisites. Example: 'Rank code completion candidates by AST validity and contextual relevance. Returns ranked list with scores and top recommendation. Use after generating candidate completions.'
• Document the output schema explicitly. Specify that the response is a JSON object with fields: ranking_id (string), ranked_candidates (array of {snippet, ast_syntax_valid, contextual_relevance_score, latency_ms}), top_recommendation (string), inference_latency_ms (number), completion_telemetry_url (string).
• Add format and constraint details to 'query_payload' parameter. Specify: expected JSON structure (e.g., {cursor_prefix_code, cursor_suffix_code, candidate_completions}), field types, and length limits. Example: 'JSON object with cursor_prefix_code (string, ≤5000 chars), cursor_suffix_code (string, ≤5000 chars), candidate_completions (array of strings, 1 - 50 items, each ≤500 chars).'
• Add error handling documentation. Specify what errors can occur (invalid JSON, payload too large, timeout) and what the LLM should do (retry, ask user for smaller input, fall back to default ranking). Include example error responses with actionable guidance.