Javis OS exposes only 1 tool: javis_read_file. The tool has a name following verb_noun convention (read_file), a brief description, and a minimal input schema with a single 'path' parameter. However, critical quality gaps emerge: the description (58 chars) lacks context about when to use it, what it returns, constraints on paths, and error handling guidance. The parameter description ('Path to the file to read') is bare-bones and provides no validation hints, format expectations, or error recovery guidance. No output schema is documented, the tool description does not specify what fields are returned or their types. Security concerns are present: the tool accepts arbitrary filesystem paths without documented restrictions, and there is no mention of sandboxing, access control, or audit logging. For a file-reading tool serving an LLM, the lack of result pagination, size limits, or content-type handling is a significant gap. The tool's risk annotation ('READ_ONLY') is present but undocumented in the tool description itself, an LLM will not know it is safe to retry.

• Expand tool description to 100-200 characters explaining: what the tool does, when to use it, what it returns, and any restrictions. Example: 'Read the full contents of a file from the filesystem. Use this to access project files, configuration, or logs. Returns the raw file contents as a string. Limited to files under 10MB; returns error for binary content or path traversal attempts.'
• Document the output schema explicitly. Specify return type (string, object, or error), encoding (UTF-8, binary, base64), and any metadata (file size, modification time). E.g., { 'content': '<file contents as string>', 'size_bytes': <int>, 'encoding': 'utf-8' }.
• Add validation rules to the path parameter description. Specify: allowed root directories (e.g., /data, /app), maximum path length, symlink policy, and character restrictions. Example: 'Absolute path to file. Must start with /data or /app. Max 1024 chars. Symlinks followed. No .. or null bytes.'
• Add error handling guidance to the description. List common failure modes and recovery steps: 'File not found → check file exists and path is correct. Permission denied → ensure file is readable by the javis user. Is a directory → call with a file path, not a directory. File too large → file exceeds 10MB limit, contact admin.'
• Implement and document security boundaries. Ensure the tool rejects path traversal attempts (../, /etc/, etc.) and returns a clear error. Add audit logging with user/timestamp. Document in the description: 'Requests are logged with timestamp and user. Path traversal attempts are rejected with error message.'