mcpgateway exposes a single meta-tool (search_tools) that aggregates federated upstream tools. The search_tools tool has a clear verb-noun name and a reasonable description (89 chars). Input schema is present with proper type and description for the 'query' parameter. However, the tool lacks output schema documentation, callers cannot see what structure SearchTools returns. The tool is READ_ONLY (appropriate risk classification). No parameter constraints (enums, min/max) are defined. Error handling in searchHandler is minimal: parse errors are wrapped but not actionable to an LLM. The gateway itself is well-architected (audit logging, hot-reload, federation), but the exposed tool definition is incomplete by production standards.

• Document the output schema in the tool definition. Add an 'outputSchema' field or update the description to specify: 'Returns an array of objects with fields: name (string), description (string), server (string). Limited to 50 results.'
• Add constraints to the 'query' parameter: minimum length 1, maximum length 256. Update description: 'Substring to search for in tool names and descriptions (1-256 chars).'
• Enhance error messages with recovery guidance. E.g., 'Failed to parse query parameter. Ensure query is a valid string (1-256 chars). Example: search_tools(query="email").'
• Update tool description to document the 50-result limit and matching behavior: 'Search federated tools by name or description substring. Returns up to 50 matching tool names, call them directly. Matches are case-insensitive.'
• Consider adding a 'limit' parameter (optional, default 20, max 50) to let callers control result count and support pagination patterns.