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VideoGen

by io.github.dg314
OverviewDiscussionsAdmin

Upscale image

upscale_image

Create a higher-resolution copy of an existing image for sharper presentation. Returns toolExecutionId; get_tool_execution provides status and the output image file. The source file is unchanged.

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": {
      "imageFileId": "<imageFileId>"
    },
    "name": "upscale_image"
  }
}

Input Schema

NameRequiredDescriptionDefault
imageFileIdYesImage to transform. Use fileId from upload_file, list_files, or a succeeded image-generation result.

Output Schema

NameRequiredDescriptionDefault
errorNoError details when status is failed; otherwise null.
statusNoJob status: pending, running, succeeded, failed, or cancelled.
resultsNoGenerated results with download URLs when succeeded.
toolTypeNoTool name (e.g. GENERATE_IMAGE).
attemptIndexNoCurrent or latest attempt index.
toolExecutionIdYesTool execution id (vg_tool_...).
progressPercentageNoCompletion progress 0-100 (present after polling).

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed33 schema fields changed
    • 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 / results / items / properties / downloadUrl / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / downloadUrl / type
      Added value: +[
+  "string",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / downloadUrlExpiresAt / anyOf
      Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / downloadUrlExpiresAt / type
      Added value: +[
+  "number",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / file / properties / description / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / description / type
      Added value: +[
+  "string",
+  "null"
+]
    • changedOutput schema / properties / results / items / properties / file / properties / downloadSource / anyOf
      Previous value: -[
-  {
-    "additionalProperties": {},
-    "description": "A file rendition source (thumbnail, preview, download, …).",
-    "properties": {
-      "expiresAt": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Unix expiry for url."
-      },
-      "fileBytes": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition size in bytes."
-      },
-      "height": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition height in pixels."
-      },
-      "status": {
-        "description": "Rendition status.",
-        "enum": [
-          "pending",
-          "ready",
-          "failed",
-          "skipped"
-        ],
-        "type": "string"
-      },
-      "url": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Signed URL when status is ready."
-      },
-      "width": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition width in pixels."
-      }
-    },
-    "required": [
-      "status"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "description": "A file rendition source (thumbnail, preview, download, …).",
+    "properties": {
+      "expiresAt": {
+        "description": "Unix expiry for url.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "fileBytes": {
+        "description": "Rendition size in bytes.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "height": {
+        "description": "Rendition height in pixels.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "status": {
+        "description": "Rendition status.",
+        "enum": [
+          "pending",
+          "ready",
+          "failed",
+          "skipped"
+        ],
+        "type": "string"
+      },
+      "url": {
+        "description": "Signed URL when status is ready.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "width": {
+        "description": "Rendition width in pixels.",
+        "type": [
+          "number",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "status"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • removedOutput schema / properties / results / items / properties / file / properties / downloadUrl / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / downloadUrl / type
      Added value: +[
+  "string",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / file / properties / downloadUrlExpiresAt / anyOf
      Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / downloadUrlExpiresAt / type
      Added value: +[
+  "number",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / file / properties / durationSeconds / anyOf
      Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / durationSeconds / type
      Added value: +[
+  "number",
+  "null"
+]
    • changedOutput schema / properties / results / items / properties / file / properties / hlsSource / anyOf
      Previous value: -[
-  {
-    "additionalProperties": {},
-    "description": "A file rendition source (thumbnail, preview, download, …).",
-    "properties": {
-      "expiresAt": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Unix expiry for url."
-      },
-      "fileBytes": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition size in bytes."
-      },
-      "height": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition height in pixels."
-      },
-      "status": {
-        "description": "Rendition status.",
-        "enum": [
-          "pending",
-          "ready",
-          "failed",
-          "skipped"
-        ],
-        "type": "string"
-      },
-      "url": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Signed URL when status is ready."
-      },
-      "width": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition width in pixels."
-      }
-    },
-    "required": [
-      "status"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "description": "A file rendition source (thumbnail, preview, download, …).",
+    "properties": {
+      "expiresAt": {
+        "description": "Unix expiry for url.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "fileBytes": {
+        "description": "Rendition size in bytes.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "height": {
+        "description": "Rendition height in pixels.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "status": {
+        "description": "Rendition status.",
+        "enum": [
+          "pending",
+          "ready",
+          "failed",
+          "skipped"
+        ],
+        "type": "string"
+      },
+      "url": {
+        "description": "Signed URL when status is ready.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "width": {
+        "description": "Rendition width in pixels.",
+        "type": [
+          "number",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "status"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • changedOutput schema / properties / results / items / properties / file / properties / previewSource / anyOf
      Previous value: -[
-  {
-    "additionalProperties": {},
-    "description": "A file rendition source (thumbnail, preview, download, …).",
-    "properties": {
-      "expiresAt": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Unix expiry for url."
-      },
-      "fileBytes": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition size in bytes."
-      },
-      "height": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition height in pixels."
-      },
-      "status": {
-        "description": "Rendition status.",
-        "enum": [
-          "pending",
-          "ready",
-          "failed",
-          "skipped"
-        ],
-        "type": "string"
-      },
-      "url": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Signed URL when status is ready."
-      },
-      "width": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition width in pixels."
-      }
-    },
-    "required": [
-      "status"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "description": "A file rendition source (thumbnail, preview, download, …).",
+    "properties": {
+      "expiresAt": {
+        "description": "Unix expiry for url.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "fileBytes": {
+        "description": "Rendition size in bytes.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "height": {
+        "description": "Rendition height in pixels.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "status": {
+        "description": "Rendition status.",
+        "enum": [
+          "pending",
+          "ready",
+          "failed",
+          "skipped"
+        ],
+        "type": "string"
+      },
+      "url": {
+        "description": "Signed URL when status is ready.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "width": {
+        "description": "Rendition width in pixels.",
+        "type": [
+          "number",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "status"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • removedOutput schema / properties / results / items / properties / file / properties / publicHlsUrl / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / publicHlsUrl / type
      Added value: +[
+  "string",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / file / properties / publicPlaybackId / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / publicPlaybackId / type
      Added value: +[
+  "string",
+  "null"
+]
    • changedOutput schema / properties / results / items / properties / file / properties / thumbnailSource / anyOf
      Previous value: -[
-  {
-    "additionalProperties": {},
-    "description": "A file rendition source (thumbnail, preview, download, …).",
-    "properties": {
-      "expiresAt": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Unix expiry for url."
-      },
-      "fileBytes": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition size in bytes."
-      },
-      "height": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition height in pixels."
-      },
-      "status": {
-        "description": "Rendition status.",
-        "enum": [
-          "pending",
-          "ready",
-          "failed",
-          "skipped"
-        ],
-        "type": "string"
-      },
-      "url": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Signed URL when status is ready."
-      },
-      "width": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Rendition width in pixels."
-      }
-    },
-    "required": [
-      "status"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "description": "A file rendition source (thumbnail, preview, download, …).",
+    "properties": {
+      "expiresAt": {
+        "description": "Unix expiry for url.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "fileBytes": {
+        "description": "Rendition size in bytes.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "height": {
+        "description": "Rendition height in pixels.",
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "status": {
+        "description": "Rendition status.",
+        "enum": [
+          "pending",
+          "ready",
+          "failed",
+          "skipped"
+        ],
+        "type": "string"
+      },
+      "url": {
+        "description": "Signed URL when status is ready.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "width": {
+        "description": "Rendition width in pixels.",
+        "type": [
+          "number",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "status"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • removedOutput schema / properties / results / items / properties / file / properties / thumbnailUrl / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / thumbnailUrl / type
      Added value: +[
+  "string",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / file / properties / thumbnailUrlExpiresAt / anyOf
      Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / thumbnailUrlExpiresAt / type
      Added value: +[
+  "number",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / file / properties / transcriptText / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / transcriptText / type
      Added value: +[
+  "string",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / file / properties / type / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / file / properties / type / type
      Added value: +[
+  "string",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / thumbnailUrl / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / thumbnailUrl / type
      Added value: +[
+  "string",
+  "null"
+]
    • removedOutput schema / properties / results / items / properties / thumbnailUrlExpiresAt / anyOf
      Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / results / items / properties / thumbnailUrlExpiresAt / type
      Added value: +[
+  "number",
+  "null"
+]
  2. Changed1 schema field changed
    • changedInput schema / properties / imageFileId / description
      Previous value: -"Source image file id."New value: +"Image to transform. Use fileId from upload_file, list_files, or a succeeded image-generation result."
  3. First observed

TDQS

A3.8/5.0
Behavior4/5

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

Beyond the annotations, the description discloses three things an agent cannot infer: the call is asynchronous and returns a toolExecutionId, status and output are retrieved via get_tool_execution, and the source file is unchanged. That last point usefully reinforces the destructiveHint=false annotation with concrete meaning rather than repeating it.

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?

Three short sentences with zero waste: what it does, how to get results, and the non-destructive guarantee. The purpose is front-loaded and the operational follow-up follows immediately.

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?

For a single-parameter async mutation with an output schema, this covers the essentials: what is produced, how to poll it, and that the original is preserved. It falls slightly short of 5 because it never says what resolution the upscale targets or whether cost/credits apply, which matters for a generation-class tool.

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 coverage is 100% and the single parameter's schema description already explains where to get the fileId (upload_file, list_files, generation results). The prose adds no further meaning about the parameter, so the baseline of 3 applies. Notably, nothing explains how the target resolution is chosen since no such parameter exists.

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: 'Create a higher-resolution copy of an existing image', plus the intent ('sharper presentation'). An agent can distinguish this from siblings like upscale_video or vectorize_image by resource type, though no sibling is named explicitly.

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

Usage Guidelines3/5

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

The intent phrase 'for sharper presentation' implies when to reach for it, and the follow-up pointer to get_tool_execution implies the async workflow. However, there is no explicit guidance on when not to use it or which alternative (vectorize_image, generate_image) to prefer when the goal is ambiguous.

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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