Critical gaps across all 52 tools. ALL parameter descriptions are null/missing (violates pattern:tool-description baseline of 100% for A+ tools). Tool descriptions are present but generic (avg ~40 chars, well below 194-char baseline). No output schemas documented. No error handling guidance. Parameter types defined but lack constraints (enums, ranges, formats). Many tools combine multiple concerns (e.g., play_scene with mode enum + custom path). STDIO transport caps protocol readiness at 50, but definition quality itself is severely limited by missing parameter documentation.

• Add non-empty descriptions to ALL 42 parameters currently marked null. Format: 'The [parameter name] controls [what it does]. Expected format: [format/enum/range]. Example: [concrete example if applicable].' Target 50-100 chars per param.
• Document output schemas for all 20 read-only tools (get_*, list_*, search_*). Include field names, types, and whether results are paginated. Example: '{"nodes": [{"path": string, "type": string, "children": Node[]}], "total": number}'
• Add error handling guidance to tool descriptions. For each tool, state: 'On error: [error type] → [recovery action].' Example: 'If scene not found, call search_files() to locate it.'
• Implement confirmation pattern for delete_scene and delete_node. Add a 'confirm' boolean parameter (default false) or return a confirmation token requiring a second call with that token.
• Expand tool descriptions from ~40 chars to 100-150 chars. Include: what it does, when to use it (vs similar tools), and any prerequisites. Example: 'Create a new scene file with a specified root node type. Use this before add_node to set up scene hierarchy. Requires valid root_type (Node, Node2D, Node3D, Control).'