Praxis demonstrates solid tool design with clear naming (verb_noun pattern), comprehensive input schemas with proper JSON Schema structure, and detailed parameter descriptions. All 9 tools have explicit schemas and descriptions. However, output schemas are not documented, LLMs cannot predict return structures. Error handling is basic (wrapTool catches exceptions but provides minimal recovery guidance). Tool descriptions average ~150 chars, within baseline (194 chars p50). Parameters are well-constrained (enums, maxLength, min/max bounds). Composition is strong: tools are single-responsibility and chain naturally (recall_skills → run_skill → reinforce). Security is adequate: no secrets in params, but no explicit permission gates or audit trail declarations.

• Document output schemas for all tools. Add a 'returns' field to each ToolDef describing the structure: e.g., recall_skills returns {skills: [{id, name, tier, ...}], negatives: [...], costEstimate: number}. This enables LLMs to plan downstream calls.
• Enhance error messages with recovery guidance. When run_skill fails, return 'Skill execution failed: [reason]. Try recall_skills() to find an alternative skill, or record_failure() to log this failure mode.' Categorize errors as retryable, user-fixable, or fatal.
• Add permission declarations to tool definitions. Each WRITE tool should declare required scopes (e.g., 'Requires: write:skills, write:library'). Add an audit_log parameter or note that calls are logged with caller identity, timestamp, and outcome.
• Improve tool descriptions with selection context. For recall_skills: 'Retrieve verified skills matching a task description. Use this to find existing solutions before creating new skills. Returns top-k skills ranked by tier, plus known failure modes to avoid.' For library_stats: 'Get library health metrics: total/verified/quarantined counts, tier distribution, weak-test count, and top performers. Use this to monitor skill quality and decide when to consolidate.'
• Rename generic tools for clarity. 'consolidate_now' → 'consolidate_skill_library' (with description: 'Run dedup-merge and cold eviction pass. Regression-safe. Use after many skills are added.'). 'library_stats' → 'get_library_health' (with description: 'Retrieve library metrics and top skills.').