mcp-gate defines 3 meta-tools with clear names (gate_list_tools, gate_get_schema, gate_call_tool) and reasonable descriptions (100-150 chars each). All tools have input schemas with type definitions and required fields. However, parameter descriptions are minimal or absent: 'filter' in gate_list_tools lacks a description; 'arguments' in gate_call_tool has only a generic description. Output schemas are not documented, callers cannot predict the structure of responses. Error handling exists but lacks recovery guidance (e.g., 'Tool not found' should suggest calling gate_list_tools). No tool annotations (readOnlyHint, destructiveHint) despite clear risk profiles (gate_call_tool is WRITE). The server acts as a gateway/proxy, so tool definitions are meta-level rather than domain-specific, which limits applicability of standard patterns.

• Document output schemas for all three tools. Specify that gate_list_tools returns {tools: [{tool: string, server: string, description: string}]}, gate_get_schema returns {schema: JSONSchema}, and gate_call_tool returns {content: [{type: string, text: string}], isError?: boolean}.
• Add descriptions to all parameters. 'filter' should be 'Optional keyword to filter tools by name, description, or server name (case-insensitive).' 'arguments' should be 'Object with tool-specific parameters; structure must match the schema from gate_get_schema.'
• Add tool annotations to the tool definitions: readOnlyHint=true for gate_list_tools and gate_get_schema; destructiveHint=true for gate_call_tool (since it executes arbitrary backend tools).
• Enhance error messages with recovery hints. E.g., 'Tool "foo" not found. Use gate_list_tools to discover available tools.' and 'Backend server failed to start. Check server configuration and logs.'
• Cap gate_list_tools results at 50 tools per response and add a 'total' field. Document in the description: 'Returns up to 50 tools; use filter to narrow results if more are available.'