This server is in early scaffolding stage. The McpServer.scala file contains only a placeholder list of tool names as strings with no actual tool registration, schemas, parameter definitions, or descriptions visible in the source. The tools are declared as a List[String] with no MCP protocol integration. No input schemas, output schemas, or parameter documentation exist. The brief one-line descriptions in the tool list ('List cryptographic keys', 'Create a new cryptographic key', etc.) are present but lack the depth required by the rubric (10-1024 chars, with parameter-level documentation). No error handling, validation, or security patterns are evident. This is a pre-alpha implementation.

• Define full JSON Schema for each tool's input parameters, including type, required fields, enums for constrained values, and min/max for numeric ranges. Example: aegis.keys.create should specify key_type (enum: RSA, AES, EC), key_size (integer, 256-4096), and description (string, max 256 chars).
• Add 50-200 character descriptions for each tool explaining WHAT it does, WHEN to use it, and any prerequisites. For destructive tools, explicitly state 'This operation is irreversible' and describe any confirmation/approval requirements.
• Document output schemas for each tool. Specify returned fields, types, and structure. For list tools, include pagination (limit, offset, total_count). For create/update tools, return the created/modified resource with all IDs needed for downstream calls.
• Implement error handling with actionable recovery guidance. Return structured errors with error_code, message, and suggested_next_step. Example: 'Key not found. Try aegis.keys.list() to see available keys.' instead of a bare 404.
• Add tool annotations (readOnlyHint, destructiveHint, idempotentHint) to the MCP protocol registration for aegis.keys.list (readOnly), aegis.keys.destroy (destructive), and aegis.keys.create (idempotent if key_id is provided).