aminghadersohi opened a new pull request, #40356:
URL: https://github.com/apache/superset/pull/40356
### SUMMARY
Adds a new `create_rls_filter` MCP mutation tool that allows AI assistants
to create row-level security (RLS) filter rules in Apache Superset.
RLS filters restrict which rows users can see based on their role
membership. This tool enables programmatic creation of these access-control
policies via the MCP service.
**Key design decisions:**
- Uses `CreateRLSRuleCommand` from `superset.commands.security.create` —
same command used by the REST API `POST /api/v1/rowlevelsecurity/`
- Admin-only: requires `Row Level Security` write permission
(`class_permission_name="Row Level Security"`, `method_permission_name="write"`)
- Tagged `mutate` with `readOnlyHint=False` following the mutation tool
pattern
- Located in `superset/mcp_service/rls/` following the existing module
structure
- Returns structured error response (not exception) for validation failures
(role/table not found)
**Supported filter types:**
- `Regular`: Hides rows from specified roles unless the SQL clause matches
- `Base`: Shows only rows where the SQL clause matches to specified roles
### BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF
N/A — backend-only MCP tool.
### TESTING INSTRUCTIONS
1. Start the Superset MCP server
2. Connect an MCP client (e.g., Claude Desktop) with admin credentials
3. Call `create_rls_filter` with:
```json
{
"name": "EMEA filter",
"filter_type": "Regular",
"tables": [<valid_table_id>],
"roles": [<valid_role_id>],
"clause": "region = 'EMEA'"
}
```
4. Verify the filter appears in Superset under Security → Row Level Security
**Error cases to test:**
- Invalid table ID → returns error field with
`DatasourceNotFoundValidationError` message
- Invalid role ID → returns error field with `RolesNotFoundValidationError`
message
### ADDITIONAL INFORMATION
- [ ] Has associated issue:
- [ ] Required feature flags:
- [ ] Changes UI
- [ ] Includes DB Migration
- [x] Introduces new feature or API
- [ ] Removes existing feature or API
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