Unicoda MCP has well-structured tool definitions with consistent naming (verb_noun pattern) and complete input schemas across all 12 tools. Descriptions are present and actionable (avg ~120 chars), explaining WHAT each tool does and WHEN to use it. However, output schemas are not documented in the visible code, critical for LLM planning. Parameter descriptions are adequate but lack constraint details (ranges, formats, examples of valid values). Error handling is minimal; tools do not guide recovery or categorize errors. No tool annotations (readOnlyHint, destructiveHint) despite clear risk classifications in the spec. Composition is strong, tools are single-responsibility and chain well (e.g., workspace_start → session_create → send). Security is reasonable (no exposed secrets in params), but audit logging is not visible.

• Document output schemas for all tools. For workspace_list, specify: returns {workspaces: [{id: string, directory: string, provider: string, status: string}], total: number}. For poll, specify the Message type structure (type, content, timestamp, metadata fields).
• Add tool annotations to tool registration. Mark workspace_stop, session_delete, send, send_and_wait as destructiveHint=true or idempotentHint=true. Mark workspace_list, session_list, session_history, poll, models_list as readOnlyHint=true.
• Enhance parameter descriptions with constraints. E.g., timeout: 'Timeout in milliseconds (min: 1000, max: 600000, default: 300000)'. For directory: 'Absolute path to project directory (must exist and be readable)'.
• Add error recovery guidance. When workspace_start fails, return: {error: 'Failed to start workspace', reason: 'Directory not found', suggestion: 'Verify the directory path exists and is readable', retryable: true}.
• Clarify workspace parameter resolution. Document: 'workspace parameter accepts workspace ID (ws-*) or absolute directory path. If both match, workspace ID takes precedence.' Or split into workspace_id and workspace_path parameters.