MY-Manus exhibits significant definition quality gaps. Tool descriptions vary widely in quality: print_message and visualize_data lack actionable context; todo and search_tools have verbose descriptions but missing parameter details; mcp_call and shell_exec are high-risk tools with minimal safety guidance. Input schemas are present but incomplete, many parameters lack type constraints (e.g., 'action' in todo accepts free-form strings instead of enum). No output schemas documented. Error handling is absent, no recovery guidance, no categorization of retryable vs. fatal errors. The server exposes dangerous operations (shell_exec, mcp_call) without confirmation patterns or permission gates. Tool composition is poor: mcp_call and search_tools create a meta-tool pattern that bypasses the MCP server's own tool registry, violating single-responsibility principle.

• Convert 'action' parameter in todo to an enum: {"type": "string", "enum": ["read", "write"], "description": "Action to perform: 'read' to view todos, 'write' to update them"}
• Add output schemas for all tools. E.g., search_tools should return {"tools": [{"name": string, "description": string, "parameters": object}], "total": integer}
• Implement confirmation pattern for shell_exec and mcp_call: add a 'dry_run' parameter or require explicit 'confirm=true' flag. Return a preview of what will execute before committing.
• Add permission gates: verify caller has 'execute:shell' or 'invoke:mcp' scope before executing. Log all invocations with caller identity, command/tool name, and result.
• Enhance error messages with recovery guidance. E.g., 'shell_exec failed: command not found. Did you mean: ls, cat, grep?' or 'todo write failed: file permission denied. Check that /tmp/todo.md is writable.'