This MCP server has significant definition quality gaps across most dimensions. While all 27 tools have names and basic descriptions, the quality is inconsistent. Tool names generally follow verb_noun convention (generateTrimCommand, generateConvertCommand, etc.), but naming is verbose and inconsistent, some use 'generate' (generateTrimCommand) while others could benefit from shorter, more direct names (trim_video, convert_media). Descriptions exist for all tools but are often generic and lack actionable guidance. For example, 'Generate FFmpeg command to convert media file between different formats and codecs' does not explain WHEN to use this tool vs alternatives, WHAT formats are supported, or what the output contains. Parameter descriptions are present but minimal, many lack format specifications, ranges, or constraints. Critical issue: INPUT SCHEMAS ARE INCOMPLETE. While parameters are declared with types and descriptions, NONE of the tools document their OUTPUT schemas. This is a hard requirement per the rubric (pattern:tool). LLMs cannot plan downstream calls without knowing what fields to expect in responses. Error handling is not visible in the tool definitions. Security concerns: the server accepts filenames as parameters without visible sanitization, creating path traversal risks. No permission gates are documented. Composition is problematic, 27 tools is a large surface area, and many appear to do similar things (e.g., generateTrimCommand, generateSpeedChangeCommand, generateStreamExtractionCommand all manipulate video). No batch variants are offered to reduce sequential calls. Parameter validation is missing, for example, timestamps like 'start' and 'end' in generateTrimCommand have no format specification, inviting malformed input.

• ADD OUTPUT SCHEMAS to every tool. Document the response structure: e.g., generateTrimCommand returns {command: string, outputFile: string, duration: string, status: 'success'|'error'}. This is non-negotiable for LLM planning.
• ADD PARAMETER CONSTRAINTS. Replace generic descriptions with explicit formats: 'frameRate' → 'Target frame rate in fps (integer, 24 - 60, common: 24, 30, 48, 60)'. Use enums for constrained values: streamType: enum ['audio', 'video'].
• EXPAND TOOL DESCRIPTIONS to 150 - 250 characters. Include WHEN/WHY context: 'Convert media between formats and codecs. Use when target platform requires specific codec (e.g., WebP for web, H.265 for storage). Returns command string and metadata.'
• ADD ERROR HANDLING GUIDANCE to each tool. E.g., 'Returns error if file not found or codec unsupported. Retry-safe: check file existence first. Ask user to provide valid codec if unsupported.'
• IMPLEMENT SERVER-SIDE INPUT VALIDATION & SANITIZATION. Validate filenames against a whitelist or sandbox directory. Reject paths with '../' or absolute paths. Return actionable errors: 'Invalid path: must be relative to /media directory.'
• CONSOLIDATE OVERLAPPING TOOLS. Merge generateTrimCommand, generateStreamExtractionCommand into a single 'extract_segment' tool with an 'operation' enum (trim, extract_audio, extract_video). Reduces surface area and cognitive load.
• ADD DESTRUCTIVE OPERATION HINTS. Mark tools that overwrite files (generateConvertCommand, generateMetadataCommand, generateSubtitlesCommand) with clear warnings in descriptions: 'WARNING: Overwrites output file if it exists. No confirmation step.'