The DaJet MCP server exposes 10 tools for querying 1C database metadata and executing parameterized queries. Tool naming follows verb_noun convention (e.g., GetMetadata, ResetCache, ExecuteQuery), which is positive. However, the server exhibits significant definition quality gaps: (1) Descriptions are present but largely generic or non-English (8 of 10 tools have descriptions in Russian, which limits LLM comprehension in English-first deployments); (2) Parameter descriptions exist but are minimal and often in Russian; (3) Output schemas are not formally documented in the code, no inline schema definitions, enums, or field descriptions visible; (4) Error handling is present in the source (try-catch blocks, McpException throws) but error messages are minimal and sometimes in Russian; (5) Parameter validation is minimal, no visible constraints, ranges, or enum definitions. The codebase shows custom tooling infrastructure ([McpServerTool] attribute, DataTypeJsonConverter) but lacks the schema rigor needed for production agent interaction. Tools 1 - 9 operate on metadata and are read-only or reversible, which is good for safety. Tool 10 (ExecuteQuery) is a powerful but potentially dangerous tool with minimal schema documentation and no visible query validation beyond 'SELECT only'. Per-tool scoring reflects these gaps.

• Translate all tool descriptions and parameter descriptions to English. Ensure descriptions are 50 - 150 characters and explain WHAT the tool does, WHEN to use it, and what it returns. Example: 'ResetCache: Clears the in-memory metadata cache for the specified 1C database. Call this after configuration changes to ensure fresh metadata. Returns a confirmation message.'
• Document output schemas for all tools. For GetDatabaseDescription, specify: {name: string, appVersion: string, platformVersion: string}. For SearchMetadataNames, specify: {results: [{fullName: string, type: string}], total: int}. Formalize these in MCP schema.
• Add enum constraints to parameters. For GetMetadataObject, declare 'type' as enum with values [Constant, Catalog, Document, Enumeration, Characteristic, Publication, BusinessTask, BusinessProcess, InformationRegister, AccumulationRegister, Account, AccountingRegister]. This enables LLM autocomplete and prevents invalid input.
• Harden ExecuteQuery: (1) Validate script starts with 'SELECT'; reject INSERT/UPDATE/DELETE with error 'Only SELECT queries are allowed. Attempted: <script>'; (2) add maxResults parameter (default 100, max 1000) and document limit in description; (3) document parameter binding syntax in description; (4) return {data: [...], rowCount: int, executionTimeMs: int} with explicit structure.
• Add parameter format constraints. For database parameters, add description: 'Database name (2-50 ASCII alphanumeric/underscore, no spaces)'. For code parameter, add: 'Numeric type code (0-65535)'. For pattern, add: 'Search pattern (case-insensitive, supports wildcards *, ?, regex allowed per DaJet Script docs)'.