12 tools with mixed quality. Naming is verb-forward and clear (scan_env_files, load_env_file, add_key, etc.), following verb_noun convention well. Descriptions are present and substantive (avg ~150 chars), explaining WHAT and WHEN. However, input schemas are visible only for 6 of 12 tools in the provided code snippet, the remaining 6 (scan_env_files, validate_key, rotate_key, search_keys, generate_master_file, unlock, get_audit_log, detect_service) lack explicit schema definitions in the excerpt. Parameter descriptions are present where schemas are shown, but several tools lack type constraints (e.g., 'files' array in rotate_key has no item type). Output schemas are not documented. Error handling is classified internally (ApiManagerErrorKind enum) but tool-level recovery guidance is absent. Security is a major concern: unlock() accepts a password parameter (default hardcoded), and the tool manages plaintext .env files without encryption, this is acknowledged in the docstring ('Not a vault') but represents a fundamental design risk for an agent tool.

• Document output schemas for all 12 tools. Specify field names, types, and whether results are paginated. Example: scan_env_files returns {files: [{path: string, size: int, modified: ISO8601}], total: int}.
• Add explicit input schemas to scan_env_files, validate_key, search_keys, generate_master_file, and get_audit_log. Include type, description, and constraints for every parameter.
• Remove password parameter from unlock(). Instead, gate visibility via HTTP session state (e.g., POST /unlock with password in body, sets a session cookie). Prevents secrets in tool parameters and logs.
• Add recovery guidance to error descriptions. E.g., validate_key: 'Validates an API key by calling the service API. If validation fails, call rotate_key to update the value, then retry.'
• Constrain rotate_key 'files' parameter: specify that items must be absolute paths to .env files, or accept a glob pattern. Add enum or regex pattern to the schema.