VideoGen

Get workflow run

get_workflow_run

Read-onlyIdempotent

Return a workflow run with status, progress, error details, projectId, projectUrl, and downloadUrl when auto-export has finished. Use this to poll an existing run without starting another project.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "workflowRunId": "<workflowRunId>"
    },
    "name": "get_workflow_run"
  }
}

Input Schema

Name	Required	Description	Default
`workflowRunId`	Yes	Run to inspect or cancel. Use workflowRunId from a workflow start result or list_workflow_runs.

Output Schema

Name	Required	Description
`error`	No	Error details when status is failed; otherwise null.
`status`	No	Job status: pending, running, succeeded, failed, or cancelled.
`exportId`	No	Export id when autoExport succeeded (vg_expo_...).
`projectId`	Yes	Project created for this exact workflow attempt (vg_proj_...). A retry creates a different project.
`projectUrl`	Yes	Deep link to the project created for this exact workflow attempt. Keep it paired with workflowRunId; a retry returns a new URL.
`downloadUrl`	No	Signed MP4 download URL when autoExport succeeded. Give this to the user.
`attemptIndex`	No	Current or latest attempt index.
`exportFileId`	No	File id of the rendered MP4 when autoExport succeeded.
`workflowType`	No	Workflow type (present after polling).
`workflowRunId`	Yes	Workflow run id (vg_work_...). Keep it paired with this response's projectId and projectUrl; a retry returns a new tuple.
`remixActionIds`	No	Remix action ids from the start response (empty when none requested).
`progressPercentage`	No	Completion progress 0-100 (present after polling).
`downloadUrlExpiresAt`	No	Unix expiry for downloadUrl.

Schema Changelog

Changes observed during successful MCP inspections.

Changed9 schema fields changedNov 4, 2026

removedOutput schema / properties / downloadUrl / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / downloadUrl / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / downloadUrlExpiresAt / anyOf

Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / downloadUrlExpiresAt / type
```
Added value: +[
+  "number",
+  "null"
+]
```

changedOutput schema / properties / error / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "code": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Machine-readable error code."
-      },
-      "internalErrorCode": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Opaque code for support."
-      },
-      "message": {
-        "description": "Human-readable error description.",
-        "type": "string"
-      },
-      "requirement": {
-        "anyOf": [
-          {
-            "additionalProperties": {},
-            "properties": {
-              "details": {
-                "additionalProperties": {
-                  "type": "string"
-                },
-                "propertyNames": {
-                  "type": "string"
-                },
-                "type": "object"
-              },
-              "type": {
-                "description": "Requirement type (e.g. purchase_add_on).",
-                "type": "string"
-              }
-            },
-            "required": [
-              "type"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "What is needed to resolve the error, when applicable."
-      }
-    },
-    "required": [
-      "message"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "code": {
+        "description": "Machine-readable error code.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "internalErrorCode": {
+        "description": "Opaque code for support.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "message": {
+        "description": "Human-readable error description.",
+        "type": "string"
+      },
+      "requirement": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "details": {
+                "additionalProperties": {
+                  "type": "string"
+                },
+                "propertyNames": {
+                  "type": "string"
+                },
+                "type": "object"
+              },
+              "type": {
+                "description": "Requirement type (e.g. purchase_add_on).",
+                "type": "string"
+              }
+            },
+            "required": [
+              "type"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "What is needed to resolve the error, when applicable."
+      }
+    },
+    "required": [
+      "message"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / exportFileId / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / exportFileId / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / exportId / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / exportId / type
```
Added value: +[
+  "string",
+  "null"
+]
```

Changed1 schema field changedOct 16, 2026

changedInput schema / properties / workflowRunId / description

Previous value: -"Workflow run id (vg_work_...)."New value: +"Run to inspect or cancel. Use workflowRunId from a workflow start result or list_workflow_runs."

First observedOct 9, 2026

TDQS

A4/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnly, idempotent, closed-world, non-destructive, so safety is covered. The description adds genuine context beyond that: that polling is safe to repeat and that downloadUrl is only populated once auto-export has finished, which explains an otherwise confusing conditional field.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, zero filler, with the return payload front-loaded and the polling guidance second. Nothing needs trimming or reordering.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists so return values need not be explained, and annotations carry the safety profile; the description still adds the conditional downloadUrl behavior and polling intent. Only minor gaps remain, such as what happens when the run ID is unknown or how often to poll.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the single workflowRunId property already explains its provenance from a start result or list_workflow_runs. The description adds no syntax, format, or sourcing detail beyond the schema, so the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Return a workflow run') and enumerates the payload it delivers (status, progress, error details, projectId, projectUrl, downloadUrl). It implicitly separates itself from run-creating tools by saying it polls 'without starting another project', though it never names list_workflow_runs or cancel_workflow_run directly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

'Use this to poll an existing run without starting another project' gives a clear when-to-use context and implicitly warns against using generation tools. It stops short of explicitly routing the agent between get_workflow_run, list_workflow_runs, and cancel_workflow_run, so no full exclusion set is provided.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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