Server has 3 well-named tools with explicit verb-noun patterns (deploy_app, promote_release, get_releases). Tool descriptions are present and actionable (70-95 chars). Input schemas are fully defined with JSON Schema types, enums, and constraints. However, OUTPUT schemas are completely undocumented, LLMs cannot determine what fields to expect from tool responses. Error handling is minimal (no recovery guidance, error classification, or actionable error messages shown). Parameter descriptions are clear but lack dependency hints and format constraints in some cases. No destructive operation safeguards or confirmation patterns visible. Parameter naming is consistent but could benefit from explicit type suffixes (e.g., 'versionCode' is clear, but 'track' could be better disambiguated). Overall, definition quality is above-average for community servers but below production grade due to missing output schemas and error handling.

• Document output schemas for all 3 tools. Example for deploy_app: { deploymentId: string, success: boolean, message: string, error?: { code: string, message: string }, timestamp: ISO8601 }. This enables LLMs to chain tools and parse responses correctly.
• Add explicit error categorization in deploy_app and promote_release responses. Include error codes (e.g., 'INVALID_VERSION_CODE', 'TRACK_NOT_FOUND', 'PERMISSION_DENIED') and recovery steps: 'Try get_releases() to find the current version, then use a higher versionCode.'
• Add destructiveHint annotation to deploy_app in tool definition (if MCP SDK supports it) or document in description: 'WARNING: This immediately publishes to Play Store. Consider using a lower track (internal, alpha) for testing first.'
• Expand parameter descriptions with explicit constraints. For versionCode: 'Integer version code. Must be higher than the current production version for this app. Use get_releases() to find the current version first.'
• Add a dry_run parameter to deploy_app (boolean, default false) to preview the deployment without committing it. This reduces the risk of accidental production deployments.
• Document get_releases() output schema clearly, including fields returned (e.g., releaseInfo[], currentVersionCode, availableTracks, lastUpdateTime). This allows agents to extract versionCode for use in promote_release without trial-and-error.