The 3GPP MCP Server provides 4 tools with mixed quality. All tools have descriptions and attempt parameter schemas, but several quality issues limit production readiness. Tool names follow verb-noun convention (search_, get_, compare_, find_), which is correct. However, parameter descriptions are present but generic in several cases, and output schemas are not documented in the source code. Error handling relies on basic McpError categories without actionable recovery guidance. The tools are read-only and low-risk, but the overall implementation falls short of A-grade standards due to incomplete output documentation and lack of detailed parameter constraints.

• Add explicit output schema documentation for each tool. In the tool definition's getDefinition() method, document the return type with field names, types, and descriptions. Example: 'Returns { results: [ { specification_id: string, title: string, release: string, series: string } ], total_count: number, next_cursor?: string }'
• Add format and constraint details to parameters. For search_specifications.max_results, change to 'Maximum number of results to return (1-100, default 5)'. For series_filter and release_filter, document expected values like 'e.g., ["TS 32", "TS 36"]'.
• Enhance error messages with recovery guidance. In CallToolRequestSchema handler, catch specific API errors and return: 'No specifications found for query "{query}". Try broadening the search or use series_filter to narrow by domain (e.g., "charging", "security").'
• Expand tool descriptions to 100-150 characters explaining the primary use case. Example for search_specifications: 'Find 3GPP technical specifications by keyword, series, or release. Use this first to locate relevant specs; then call get_specification_details for full content.'
• Add offset/limit or cursor pagination to search_specifications. Implement next_cursor in response and accept offset parameter to handle large result sets without truncation.
• Document tool composition. Add notes to compare_specifications explaining that it requires specification_ids from search_specifications or known identifiers, this guides multi-step agent planning.
• Add parameter dependencies in descriptions. For find_implementation_requirements, note: 'The optional domain parameter (charging, security, mobility) narrows results; if omitted, all domains are searched.'