fix: address PR review feedback (round 3)

Bugs:
- assign_tag/remove_tag now call _unwrap_ocs to surface OCS-level errors
- trash_page changed to idempotentHint=False (trashing twice errors)
- WebDAV path parts stripped of slashes to prevent double-slash paths

Robustness:
- _unwrap_ocs uses ocs.get("data", {}) instead of ocs["data"]
- Unit test added for missing data key in OCS envelope

Minor:
- MCP error codes use -1 (project convention) instead of HTTP status codes
- update_collective docstring notes that emoji is required
- CollectiveTag.color validated as hex format via field_validator

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

nextcloud_mcp_server/client/collectives.py

@@ -40,7 +40,7 @@ class CollectivesClient(BaseNextcloudClient):
         if status_code >= 400:
             message = meta.get("message", "OCS error")
             raise OCSError(status_code, message)
-        return ocs["data"]
+        return ocs.get("data", {})
 
     # Collectives
 
@@ -215,19 +215,21 @@ class CollectivesClient(BaseNextcloudClient):
 
     async def assign_tag(self, collective_id: int, page_id: int, tag_id: int) -> None:
         """Assign a tag to a page."""
-        await self._make_request(
+        response = await self._make_request(
             "PUT",
             f"{API_BASE}/collectives/{collective_id}/pages/{page_id}/tags/{tag_id}",
             headers=self._get_ocs_headers(),
         )
+        self._unwrap_ocs(response.json())
 
     async def remove_tag(self, collective_id: int, page_id: int, tag_id: int) -> None:
         """Remove a tag from a page."""
-        await self._make_request(
+        response = await self._make_request(
             "DELETE",
             f"{API_BASE}/collectives/{collective_id}/pages/{page_id}/tags/{tag_id}",
             headers=self._get_ocs_headers(),
         )
+        self._unwrap_ocs(response.json())
 
     # Trash
 

nextcloud_mcp_server/models/collectives.py

@@ -1,6 +1,8 @@
 """Pydantic models for Nextcloud Collectives app."""
 
-from pydantic import BaseModel, Field
+import re
+
+from pydantic import BaseModel, Field, field_validator
 
 from .base import BaseResponse, StatusResponse
 
@@ -53,7 +55,14 @@ class CollectiveTag(BaseModel):
     id: int = Field(description="Tag ID")
     collectiveId: int = Field(description="Parent collective ID")
     name: str = Field(description="Tag name")
-    color: str = Field(description="Hex color code")
+    color: str = Field(description="Hex color code (e.g. 'FF0000')")
+
+    @field_validator("color")
+    @classmethod
+    def validate_hex_color(cls, v: str) -> str:
+        if not re.fullmatch(r"[0-9A-Fa-f]{3,8}", v):
+            raise ValueError(f"Invalid hex color: {v!r}")
+        return v
 
 
 # Response Models

nextcloud_mcp_server/server/collectives.py

@@ -34,8 +34,8 @@ logger = logging.getLogger(__name__)
 def _handle_collectives_error(e: OCSError | HTTPStatusError) -> McpError:
     """Convert OCS or HTTP errors to McpError."""
     if isinstance(e, OCSError):
-        return McpError(ErrorData(code=e.status_code, message=e.message))
-    return McpError(ErrorData(code=e.response.status_code, message=str(e)))
+        return McpError(ErrorData(code=-1, message=e.message))
+    return McpError(ErrorData(code=-1, message=str(e)))
 
 
 def configure_collectives_tools(mcp: FastMCP):
@@ -120,7 +120,7 @@ def configure_collectives_tools(mcp: FastMCP):
             if page.filePath:
                 parts.append(page.filePath)
             parts.append(page.fileName)
-            webdav_path = "/".join(parts)
+            webdav_path = "/".join(p.strip("/") for p in parts)
             try:
                 file_bytes, _ = await client.webdav.read_file(webdav_path)
                 content = file_bytes.decode("utf-8")
@@ -243,11 +243,13 @@ def configure_collectives_tools(mcp: FastMCP):
     async def collectives_update_collective(
         ctx: Context, collective_id: int, emoji: str | None = None
     ) -> CollectiveOperationResponse:
-        """Update a Nextcloud Collective (emoji)
+        """Update a Nextcloud Collective (emoji).
+
+        At least one field must be provided.
 
         Args:
             collective_id: ID of the collective
-            emoji: New emoji for the collective
+            emoji: New emoji for the collective (required)
         """
         client = await get_client(ctx)
         try:
@@ -340,7 +342,7 @@ def configure_collectives_tools(mcp: FastMCP):
     @mcp.tool(
         title="Trash Collective Page",
         annotations=ToolAnnotations(
-            destructiveHint=True, idempotentHint=True, openWorldHint=True
+            destructiveHint=True, idempotentHint=False, openWorldHint=True
         ),
     )
     @require_scopes("collectives:write")