eNSP MCP has well-structured tool definitions with consistent naming (verb_noun pattern: list_models, topo_create, device_exec) and comprehensive descriptions in Chinese. All 13 tools have input schemas with typed parameters and descriptions. However, output schemas are not explicitly documented in the visible code, responses are JSON strings with ad-hoc structure (ok/error fields). Parameter descriptions are detailed but sometimes verbose (>200 chars). Error handling returns structured JSON with ok/error flags but lacks actionable recovery guidance. No tool annotations (readOnlyHint/destructiveHint) despite clear risk levels. Missing: pagination for list_models, explicit output schema documentation, and per-parameter type constraints (enums for category, view, action).

• Add explicit output schema documentation to all tools. Define the structure of ok/error responses with typed fields (e.g., ok: boolean, error?: string, path?: string, deviceCount?: number).
• Declare enum constraints in JSON Schema for category, view, action, format, mode, and lineType parameters. Replace free-form strings with formal constraints.
• Add tool annotations via MCP protocol: mark topo_* and device_* tools with readOnlyHint=true for READ_ONLY operations and destructiveHint=true for WRITE operations.
• Enhance error messages with recovery guidance. E.g., 'Model "XYZ" not found. Call list_models() to see available models.' or 'File not found at {path}. Check the path or use topo_create() to create a new topology.'
• Document pagination for list_models if result count exceeds ~50 items. Add limit and offset parameters to prevent context window exhaustion.