This server has 7 tools with basic descriptions and input schemas, but significant gaps in parameter documentation, output schema clarity, and error handling guidance. Tool names follow verb_noun convention (get_, translate_, apply_), which is good. However, descriptions are minimal (10-80 chars), parameter descriptions are sparse or missing, and output schemas are undocumented. No tool annotations (readOnlyHint/destructiveHint). Error handling is minimal, no recovery guidance, no actionable error messages. The three write tools (apply_tool, apply_missing_tool, translate_key_tool) lack confirmation patterns or dry-run capability despite modifying user files. Most parameters lack format constraints, valid ranges, or dependency documentation. This is typical of a community MCP server that works but lacks production-grade polish.

• Document the return type and structure for every tool. Example: get_languages_tool should return {"languages": ["en", "es", "fr"], "count": 3}. Add 'Returns' section to server.py tool definitions.
• Add tool annotations to all tool definitions. Use readOnlyHint: true for get_* and translate_tool; destructiveHint: true for apply_tool, apply_missing_tool, translate_key_tool. This signals to agents which tools are safe to retry.
• Expand parameter descriptions with format and constraints. Example: 'target_language (required): ISO 639-1 language code (e.g. es, fr, de, ja). Must match a code in the xcstrings file localizations.' Use enums if possible.
• Implement dry-run mode for write tools. Add optional 'dry_run' boolean parameter to apply_tool and apply_missing_tool. When true, return predicted changes without modifying the file. Example: 'Would translate 12 missing keys for es: {key1: translated_value1, ...}'
• Add pagination support to get_keys_tool and get_base_strings_tool. Include limit (default 50, max 500) and offset parameters. Return {"keys": [...], "total": 1234, "offset": 0, "limit": 50, "hasMore": true}.
• Expand tool descriptions to 50 - 150 characters each. Include WHEN to use and WHAT it returns. Example: 'get_languages_tool: Retrieve all supported languages in an xcstrings file. Call this first to see available targets before translating. Returns list of ISO 639-1 codes.'
• Replace comma-separated string for 'target_languages' in translate_key_tool with array type. Change input schema from {"target_languages": {"type": "string"}} to {"target_languages": {"type": "array", "items": {"type": "string", "enum": ["es", "fr", "de", "ja", ...]}}} so agents cannot hallucinate invalid codes.