feat: migrate to use MCP tools instead of helper scripts

mcp-server/src/validation/queue-validator.js

@@ -0,0 +1,51 @@
+/**
+ * Queue Validator
+ *
+ * Validates JSON structure for vulnerability queue files.
+ * Ported from tools/save_deliverable.js (lines 56-75).
+ */
+
+/**
+ * @typedef {Object} ValidationResult
+ * @property {boolean} valid
+ * @property {string} [message]
+ * @property {Object} [data]
+ */
+
+/**
+ * Validate JSON structure for queue files
+ * Queue files must have a 'vulnerabilities' array
+ *
+ * @param {string} content - JSON string to validate
+ * @returns {ValidationResult} ValidationResult with valid flag, optional error message, and parsed data
+ */
+export function validateQueueJson(content) {
+  try {
+    const parsed = JSON.parse(content);
+
+    // Queue files must have a 'vulnerabilities' array
+    if (!parsed.vulnerabilities) {
+      return {
+        valid: false,
+        message: `Invalid queue structure: Missing 'vulnerabilities' property. Expected: {"vulnerabilities": [...]}`,
+      };
+    }
+
+    if (!Array.isArray(parsed.vulnerabilities)) {
+      return {
+        valid: false,
+        message: `Invalid queue structure: 'vulnerabilities' must be an array. Expected: {"vulnerabilities": [...]}`,
+      };
+    }
+
+    return {
+      valid: true,
+      data: parsed,
+    };
+  } catch (error) {
+    return {
+      valid: false,
+      message: `Invalid JSON: ${error instanceof Error ? error.message : String(error)}`,
+    };
+  }
+}