diff --git a/src/mcp_atlassian/models/jira/adf.py b/src/mcp_atlassian/models/jira/adf.py
new file mode 100644
index 00000000..712917ff
--- /dev/null
+++ b/src/mcp_atlassian/models/jira/adf.py
@@ -0,0 +1,51 @@
+"""
+Atlassian Document Format (ADF) utilities.
+
+This module provides utilities for parsing ADF content from Jira Cloud.
+"""
+
+
+def adf_to_text(adf_content: dict | list | str | None) -> str | None:
+    """
+    Convert Atlassian Document Format (ADF) content to plain text.
+
+    ADF is Jira Cloud's rich text format returned for fields like description.
+    This function recursively extracts text content from the ADF structure.
+
+    Args:
+        adf_content: ADF document (dict), content list, string, or None
+
+    Returns:
+        Plain text string or None if no content
+    """
+    if adf_content is None:
+        return None
+
+    if isinstance(adf_content, str):
+        return adf_content
+
+    if isinstance(adf_content, list):
+        texts = []
+        for item in adf_content:
+            text = adf_to_text(item)
+            if text:
+                texts.append(text)
+        return "\n".join(texts) if texts else None
+
+    if isinstance(adf_content, dict):
+        # Check if this is a text node
+        if adf_content.get("type") == "text":
+            return adf_content.get("text", "")
+
+        # Check if this is a hardBreak node
+        if adf_content.get("type") == "hardBreak":
+            return "\n"
+
+        # Recursively process content
+        content = adf_content.get("content")
+        if content:
+            return adf_to_text(content)
+
+        return None
+
+    return None
diff --git a/src/mcp_atlassian/models/jira/comment.py b/src/mcp_atlassian/models/jira/comment.py
index c1ac7643..0befaf9b 100644
--- a/src/mcp_atlassian/models/jira/comment.py
+++ b/src/mcp_atlassian/models/jira/comment.py
@@ -12,6 +12,7 @@
     EMPTY_STRING,
     JIRA_DEFAULT_ID,
 )
+from .adf import adf_to_text
 from .common import JiraUser
 
 logger = logging.getLogger(__name__)
@@ -58,14 +59,13 @@ def from_api_response(cls, data: dict[str, Any], **kwargs: Any) -> "JiraComment"
         if comment_id is not None:
             comment_id = str(comment_id)
 
-        # Get the body content
+        # Get the body content - can be string (legacy) or ADF dict (Jira Cloud)
         body_content = EMPTY_STRING
         body = data.get("body")
-        if isinstance(body, dict) and "content" in body:
+        if isinstance(body, dict):
             # Handle Atlassian Document Format (ADF)
-            # This is a simplified conversion - a proper implementation would
-            # parse the ADF structure
-            body_content = str(body.get("content", EMPTY_STRING))
+            converted = adf_to_text(body)
+            body_content = converted if converted else EMPTY_STRING
         elif body:
             # Handle plain text or HTML content
             body_content = str(body)
diff --git a/src/mcp_atlassian/models/jira/issue.py b/src/mcp_atlassian/models/jira/issue.py
index d036d999..5a1f51c1 100644
--- a/src/mcp_atlassian/models/jira/issue.py
+++ b/src/mcp_atlassian/models/jira/issue.py
@@ -16,6 +16,7 @@
     JIRA_DEFAULT_ID,
     JIRA_DEFAULT_KEY,
 )
+from .adf import adf_to_text
 from .comment import JiraComment
 from .common import (
     JiraAttachment,
@@ -267,7 +268,14 @@ def from_api_response(cls, data: dict[str, Any], **kwargs: Any) -> "JiraIssue":
         issue_id = str(data.get("id", JIRA_DEFAULT_ID))
         key = str(data.get("key", JIRA_DEFAULT_KEY))
         summary = str(fields.get("summary", EMPTY_STRING))
-        description = fields.get("description")
+
+        # Handle description - can be string (legacy) or ADF dict (Jira Cloud new editor)
+        raw_description = fields.get("description")
+        if isinstance(raw_description, dict):
+            # Convert ADF to plain text
+            description = adf_to_text(raw_description)
+        else:
+            description = raw_description
 
         # Timestamps
         created = str(fields.get("created", EMPTY_STRING))