Server has 9 tools with complete schemas and descriptions. Naming follows verb_noun convention (search_, get_, validate_, diagnose_, analyze_, explain_, find_, get_). Descriptions are present and substantive (avg ~120 chars), exceeding the 10-char minimum. All parameters have type definitions and descriptions. However, output schemas are not explicitly documented in the source, only inferred from return statements. Error handling is minimal; tools return raw dicts without recovery guidance. No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite all being read-only. Parameter descriptions lack format/constraint details (e.g., 'path' params don't specify absolute vs relative, or path traversal guards). No pagination support for list-like results (search_eu4_docs, get_related_mechanics, find_mod_symbol). Missing per-tool security notes (e.g., file access scope).

• Document output schemas for all 9 tools. Specify field names, types (string, int, array, object), required fields, and nested structure. Use JSON Schema format in tool registration or docstrings.
• Add readOnlyHint: true to all tool definitions via @server.tool() decorator or MCPServer API to signal idempotency and safe retry semantics.
• Add path validation: document that 'path' parameters must be absolute or relative to a configured mod root, and reject paths containing '..' or symlinks outside the root. Implement Path(path).resolve() checks in each tool.
• Document error responses: specify what happens when a file is not found, a query returns no results, or a mod directory is invalid. Return structured error objects with 'error' field, 'code', and 'recovery_hint'.
• Add pagination metadata to search results: include 'total_count' and 'has_more' fields so LLM knows whether to request additional pages. Document default limit (5 for search_eu4_docs, 10 for find_mod_symbol).