This MCP server exposes two secrets management tools with basic but incomplete definitions. Both tools have action-verb names (get_secret, set_secret) and descriptions present, but critical gaps exist: (1) No input schema validation visible in the code, parameter types are declared in the JSON structure but no enum constraints, ranges, or format specifications are enforced; (2) Parameter descriptions are minimal (avg ~45 chars) and lack actionable details like expected format or constraints; (3) No output schema documentation, the code shows return statements but no structured response types are defined; (4) Error handling is minimal, exceptions are caught and re-raised with only generic messages, no guidance for recovery; (5) No security annotations or permission gates visible; (6) The tools do operate on a single responsibility (get vs set) so composition is sound. The server lacks the rigor expected of a production secrets tool: no validation of service_name/secret_key formats, no rate limiting, no audit logging visible, and no documented return types.

• Add explicit output schema documentation for both tools. Specify whether they return a plain string, a JSON object with metadata, or a success/error status. Example: '{"success": boolean, "value": string, "message": string}'.
• Enhance parameter descriptions with format constraints and examples. For service_name and secret_key, specify allowed characters (alphanumeric, hyphens, underscores), min/max length (e.g., 1-255 chars), and whether they are case-sensitive.
• Implement input validation: reject empty strings, whitespace-only values, and keys exceeding reasonable length limits (e.g., > 255 chars). Return validation errors with the invalid value and the constraint violated.
• Add permission/scope checks. Verify that the calling agent/user has 'secrets:read' or 'secrets:write' permissions before executing. Log access with timestamps and identities.
• Enhance error messages with recovery guidance. When a secret is not found, return available service names or suggest using set_secret to create it. For set_secret conflicts, offer to overwrite or abort.
• Add an optional dry_run or confirm_required parameter to set_secret. When true, return what would be stored without actually writing, allowing the agent to preview before committing.
• Implement audit logging: log every get/set operation with caller identity, parameters (excluding secret values), timestamp, and outcome. Ensure logs do not contain sensitive data.
• Consider rate limiting: cap the number of get/set calls per minute per agent to prevent abuse (e.g., brute-force attempts to guess secrets).