mcp-sqlserver demonstrates solid naming conventions (verb_noun pattern: list_databases, describe_table, find_entities) and comprehensive parameter schemas with types and descriptions. However, tool descriptions are inconsistent in depth, some are clear and actionable (e.g., 'Show columns, indexes, constraints, and relationships for a table'), while others lack context on when to use them or what they return. Parameter descriptions are generally present but often minimal (e.g., 'Table name' without format guidance). Output schemas are not explicitly documented in the source, forcing LLMs to infer structure. Error handling guidance is absent, no recovery hints or categorization. Security is well-handled (read-only enforcement, no secrets in params), but composition could be tighter: some tools (e.g., find_entities, suggest_join_path) overlap in intent and could be unified. Pagination is implemented consistently across list/search tools, which is good practice.

• Document output schemas for all tools. For list_tables, specify: {tables: [{name: string, schema: string, type: 'table'|'view', row_count?: number}], total: number, page: number}. For query, specify: {rows: [{[column]: value}], columns: [string], total: number}.
• Add error recovery guidance to tool descriptions. E.g., query: 'If the query fails with a syntax error, check column names with describe_table(). If a table is not found, use find_tables() to search by partial name.'
• Consolidate find_entities, suggest_join_path, and plan_query into a single explore_schema tool with a mode parameter (search|join_path|plan) to reduce tool proliferation and decision overhead.
• Enhance parameter descriptions with format and constraint details. E.g., schema param: 'Schema name (e.g., dbo, Sales). Leave empty to search all schemas. Case-insensitive.'
• Add tool annotations to the MCP server registration. Mark all tools with readOnlyHint: true and idempotentHint: true to signal safety to agents and enable aggressive caching/retry strategies.