Strong foundation with clear verb-based naming (list_*, get_*, start_*, cancel_*) and comprehensive parameter descriptions. All 7 tools have documented input schemas with type definitions and parameter descriptions. Tool descriptions are concise (40-80 chars) and action-oriented. Key strengths: explicit risk classification (READ_ONLY vs WRITE), parameter constraints (limit bounds, mutually exclusive params), and security-conscious design (no secrets in params, variable values never returned). Gaps: output schemas not formally documented in source; error handling guidance minimal; no pagination metadata (total count, next_cursor) visible in list tools despite accepting limits.

• Document output schemas for all tools. Define the structure of returned objects (e.g., app object contains {id, name, repository_url, project_type?, default_branch?, last_build_id?}). Use JSON Schema or explicit field descriptions so LLMs know what to extract.
• Add pagination metadata to list_* tools. Include 'total_count' and 'has_more' in responses, and document in descriptions: 'Returns up to 10 apps (default). Use limit parameter to fetch more. Response includes total_count to indicate if additional pages exist.'
• Enhance error handling descriptions. For start_build, add: 'Requires CODEMAGIC_ALLOW_BUILDS=true environment variable. Returns 403 if not set. For cancel_build, returns 400 if build already finished (not an error, operation is idempotent).'
• Add confirmation step for destructive operations. Implement a dry_run parameter for start_build (returns what would be built without actually starting) or a separate preview_build tool. For cancel_build, document that it is idempotent and safe to retry.
• Formalize enum constraints in schemas. Replace description text like 'e.g. finished, failed, cancelled' with explicit enum: {"type": "string", "enum": ["finished", "failed", "cancelled"]}. Same for 'verbosity' parameter.