29 tools with mixed definition quality. Most tools have clear verb-noun naming (android_build_aab, ios_upload_to_testflight, etc.) and appropriate descriptions (average 85-150 chars per tool examined). All tools have input schemas with typed parameters and descriptions. However, several issues reduce overall quality: (1) Parameters lack granular constraints, many accept free-form strings where enums would be better (e.g., 'release_status' in android_upload_to_production accepts free-form when it should enumerate 'completed|draft|halted|inProgress'). (2) Output schemas are not documented in the tool definitions, LLMs cannot see what fields to expect from responses. (3) Error handling is minimal, tool calls return generic CommandResult objects with 'success' and 'message' fields but do not provide actionable recovery guidance. (4) Tool descriptions lack dependency hints and prerequisites. (5) No tool explicitly declares mutually exclusive parameters (e.g., aab_path vs apk_path in upload_to_internal). Sample tools analyzed: android_build_aab (good naming, clear description, parameters typed but not constrained), android_upload_to_production (DESTRUCTIVE but no confirmation pattern), ios_upload_to_testflight (array parameter 'groups' lacks description of expected format). The codebase shows defensive validation in helpers like validate_play_release_status and validate_rollout, but these are not surfaced in parameter schemas. Overall: solid foundation with clear tool structure, but lacks LLM-optimization patterns (enums, output schemas, error recovery guidance).

• Add JSON Schema output schemas to all tools. Document the CommandResult structure and any additional fields (e.g., 'data' object contents). Example: { success: boolean, message: string, data: { build_path: string, size_bytes: number, timestamp: string } }.
• Replace free-form string parameters with enums where valid values are known. For release_status, use enum: ['completed', 'draft', 'halted', 'inProgress']. For platform, use enum: ['all', 'google_play', 'app_store'].
• Enhance error responses with actionable recovery guidance. Instead of 'Error: Build failed', return 'Build failed: Android SDK not found. Ensure ANDROID_SDK_ROOT is set. Run android_validate_play_auth to diagnose.'
• Add dry-run or confirmation pattern to destructive tools (android_upload_to_production, ios_upload_to_app_store). Example: add 'dry_run: boolean' parameter; if true, simulate and return what would be published without committing.
• Document mutually exclusive parameters explicitly. Example for android_upload_to_internal: 'aab_path and apk_path are mutually exclusive, provide exactly one. If both omitted, auto-detect latest build.'
• Improve parameter descriptions with format examples. For app_config_path: 'Path to fastlane config file (YAML or JSON, relative to project_root, default: fastlane/Appfile).'
• Add per-tool dependency hints in descriptions. Example for android_upload_to_production: 'Requires prior successful build (call android_build_aab first) and validated credentials (call android_validate_play_auth).'

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry