list draft workspaces: one tool

docs/wf_mcp_end_to_end_runbook.md

@@ -503,11 +503,13 @@ Concrete MCP sequence:
    capability behaves as expected.
 3. `wf.workflow.create_minimal_draft_workspace` with a `request` object that
    contains schemas, `input_map`, and `output_map`.
-4. `wf.workflow.get_draft_workspace` with `include_draft=true` if the client
+4. `wf.workflow.list_draft_workspaces` if the client needs to rediscover
+   existing workspace ids.
+5. `wf.workflow.get_draft_workspace` with `include_draft=true` if the client
    needs to inspect the full current draft.
-5. `wf.workflow.patch_draft_workspace` with the current `revision`.
-6. `wf.workflow.create_artifact_from_workspace` after validation is clean.
-7. `wf.workflow.save_deployment`, then `validate_deployment`, then
+6. `wf.workflow.patch_draft_workspace` with the current `revision`.
+7. `wf.workflow.create_artifact_from_workspace` after validation is clean.
+8. `wf.workflow.save_deployment`, then `validate_deployment`, then
    `run_deployment`.
 
 `create_artifact_from_workspace` also uses a `request` object:

docs/wf_mcp_operator_manual.md

@@ -349,6 +349,7 @@ resending the full draft each turn.
 | Need | Tool |
 | --- | --- |
 | Start a patchable authoring session | `wf.workflow.create_minimal_draft_workspace` |
+| List existing draft sessions | `wf.workflow.list_draft_workspaces` |
 | Fetch current draft workspace | `wf.workflow.get_draft_workspace` |
 | Patch current draft workspace | `wf.workflow.patch_draft_workspace` |
 | Save final workspace as artifact | `wf.workflow.create_artifact_from_workspace` |

src/wf_mcp/transparent_proxy/runtime.py

@@ -41,6 +41,7 @@ _SEARCH_ALWAYS_VISIBLE_TOOL_NAMES = [
     "wf.workflow.create_artifact_from_plan",
     "wf.workflow.create_artifact_from_draft",
     "wf.workflow.patch_draft",
+    "wf.workflow.list_draft_workspaces",
     "wf.workflow.create_draft_workspace",
     "wf.workflow.get_draft_workspace",
     "wf.workflow.patch_draft_workspace",

src/wf_mcp/workflow_surface/handlers.py

@@ -375,6 +375,16 @@ class WorkflowSurfaceHandlers:
             raise KeyError("draft workspace store is not configured")
         return self.service.draft_workspace_store
 
+    async def list_draft_workspaces(self) -> dict[str, Any]:
+        """Return compact summaries for stored draft workspaces."""
+        store = self._draft_store()
+        return {
+            "workspaces": [
+                get_draft_workspace_record(store, workspace_id=workspace.id)
+                for workspace in store.list_workspaces()
+            ]
+        }
+
     async def create_draft_workspace(
         self,
         *,

src/wf_mcp/workflow_surface/models.py

@@ -91,6 +91,14 @@ class DraftWorkspaceResult(BaseModel):
     )
 
 
+class DraftWorkspaceListResult(BaseModel):
+    """Inspector-visible response for listing stored draft workspaces."""
+
+    workspaces: list[dict[str, Any]] = Field(
+        description="Compact draft workspace summaries. Full drafts are omitted."
+    )
+
+
 class CreateDraftWorkspaceRequest(BaseModel):
     """Typed MCP request payload for creating a stored draft workspace."""
 

src/wf_mcp/workflow_surface/tools.py

@@ -14,6 +14,7 @@ from .models import (
     CreateArtifactFromWorkspaceRequest,
     CreateDraftWorkspaceRequest,
     CreateMinimalDraftWorkspaceRequest,
+    DraftWorkspaceListResult,
     DraftWorkspaceResult,
     PatchDraftWorkspaceRequest,
 )
@@ -197,6 +198,16 @@ def register_workflow_tools(server: FastMCP[Any], service: WfMcpService) -> None
     ) -> dict[str, Any]:
         return await handlers.patch_draft(draft=draft, patch=patch)
 
+    @server.tool(
+        name="wf.workflow.list_draft_workspaces",
+        title="List Draft Workspaces",
+        description="List compact summaries for mutable workflow draft workspaces.",
+    )
+    async def list_draft_workspaces() -> DraftWorkspaceListResult:
+        return DraftWorkspaceListResult.model_validate(
+            await handlers.list_draft_workspaces()
+        )
+
     @server.tool(
         name="wf.workflow.create_draft_workspace",
         title="Create Draft Workspace",

tests/wf_mcp/test_server.py

@@ -64,6 +64,7 @@ def test_server_exposes_upstream_admin_and_workflow_tools() -> None:
             assert "wf.workflow.compile_draft" in names
             assert "wf.workflow.create_artifact_from_draft" in names
             assert "wf.workflow.patch_draft" in names
+            assert "wf.workflow.list_draft_workspaces" in names
             assert "wf.workflow.create_draft_workspace" in names
             assert "wf.workflow.get_draft_workspace" in names
             assert "wf.workflow.patch_draft_workspace" in names
@@ -187,6 +188,7 @@ def test_server_search_mode_pins_stable_control_and_workflow_tools() -> None:
             assert "wf.workflow.list_artifacts" in names
             assert "wf.workflow.validate_draft" in names
             assert "wf.workflow.create_artifact_from_draft" in names
+            assert "wf.workflow.list_draft_workspaces" in names
             assert "wf.workflow.create_draft_workspace" in names
             assert "wf.workflow.get_draft_workspace" in names
             assert "wf.workflow.patch_draft_workspace" in names

tests/wf_mcp/test_workflow_surface.py

@@ -377,6 +377,36 @@ def test_workflow_surface_creates_and_gets_draft_workspace() -> None:
     assert fetched["draft"]["steps"]["echo"]["use"] == "demo.personal.echo_tool"
 
 
+def test_workflow_surface_lists_draft_workspaces() -> None:
+    artifact_store = FileWorkflowArtifactStore(
+        local_temp_root() / "surface_workspace_list"
+    )
+    handlers = _handlers(artifact_store)
+    asyncio.run(
+        handlers.create_draft_workspace(
+            workspace_id="b_draft",
+            draft=_echo_draft(),
+            title="B Draft",
+        )
+    )
+    asyncio.run(
+        handlers.create_draft_workspace(
+            workspace_id="a_draft",
+            draft=_echo_draft(),
+            title="A Draft",
+        )
+    )
+
+    payload = asyncio.run(handlers.list_draft_workspaces())
+
+    assert [workspace["workspace_id"] for workspace in payload["workspaces"]] == [
+        "a_draft",
+        "b_draft",
+    ]
+    assert payload["workspaces"][0]["title"] == "A Draft"
+    assert "draft" not in payload["workspaces"][0]
+
+
 def test_workflow_surface_patches_draft_workspace_by_revision() -> None:
     artifact_store = FileWorkflowArtifactStore(
         local_temp_root() / "surface_workspace_patch"