Kuro

Resume workflow run

resume_workflow_run

Resume the current pause or checkpoint using its revision from get_workflow_run a workflow run.

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": {
      "run_id": "<run_id>",
      "revision": "<revision>"
    },
    "name": "resume_workflow_run"
  }
}

Input Schema

Name	Required	Description	Default
`run_id`	Yes
`revision`	Yes

Output Schema

Name	Required	Description	Default
`run`	No
`count`	No
`steps`	No
`credits`	No
`fan_outs`	No
`recovery`	No
`checkpoint`	No
`storyboard`	No
`conditional`	No
`generations`	No
`review_hash`	No
`unit_credits`	No
`analysis_credits`	No
`checkpoint_error`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedNov 4, 2026

changedOutput schema / properties / generations / items / additionalProperties
```
Previous value: -{}New value: +false
```
addedOutput schema / properties / generations / items / description
```
Added value: +"One image, clip, voice-over or piece of music."
```

addedOutput schema / properties / generations / items / properties

Added value: +{
+  "app_url": {
+    "description": "Opens it in the app.",
+    "format": "uri",
+    "type": "string"
+  },
+  "aspect_ratio": {
+    "description": "Null for audio.",
+    "type": [
+      "string",
+      "null"
+    ]
+  },
+  "caption_style": {
+    "anyOf": [
+      {
+        "additionalProperties": false,
+        "properties": {
+          "anchor": {
+            "default": "bottom",
+            "enum": [
+              "top",
+              "bottom"
+            ],
+            "type": "string"
+          },
+          "border": {
+            "anyOf": [
+              {
+                "additionalProperties": false,
+                "properties": {
+                  "color": {
+                    "$ref": "#/properties/generations/items/properties/caption_style/anyOf/0/properties/color",
+                    "default": "#000000"
+                  },
+                  "kind": {
+                    "const": "outline",
+                    "type": "string"
+                  },
+                  "scale": {
+                    "default": 0.049,
+                    "maximum": 0.3,
+                    "minimum": 0,
+                    "type": "number"
+                  },
+                  "shadow_scale": {
+                    "default": 0.012,
+                    "maximum": 0.3,
+                    "minimum": 0,
+                    "type": "number"
+                  }
+                },
+                "required": [
+                  "kind"
+                ],
+                "type": "object"
+              },
+              {
+                "additionalProperties": false,
+                "properties": {
+                  "color": {
+                    "$ref": "#/properties/generations/items/properties/caption_style/anyOf/0/properties/color",
+                    "default": "#000000"
+                  },
+                  "kind": {
+                    "const": "plate",
+                    "type": "string"
+                  },
+                  "pad_scale": {
+                    "default": 0.025,
+                    "maximum": 0.3,
+                    "minimum": 0,
+                    "type": "number"
+                  }
+                },
+                "required": [
+                  "kind"
+                ],
+                "type": "object"
+              }
+            ],
+            "default": {
+              "color": "#000000",
+              "kind": "outline",
+              "scale": 0.049,
+              "shadow_scale": 0.012
+            }
+          },
+          "casing": {
+            "default": "upper",
+            "enum": [
+              "none",
+              "upper"
+            ],
+            "type": "string"
+          },
+          "color": {
+            "default": "#FFFFFF",
+            "pattern": "^#[0-9a-fA-F]{6}(?:[0-9a-fA-F]{2})?$",
+            "type": "string"
+          },
+          "font_id": {
+            "default": "noto-sans",
+            "enum": [
+              "inter",
+              "montserrat",
+              "oswald",
+              "archivo-black",
+              "noto-sans",
+              "tiktok-sans"
+            ],
+            "type": "string"
+          },
+          "font_scale": {
+            "default": 0.075,
+            "maximum": 0.2,
+            "minimum": 0.02,
+            "type": "number"
+          },
+          "font_weight": {
+            "default": 700,
+            "maximum": 900,
+            "minimum": 100,
+            "multipleOf": 100,
+            "type": "integer"
+          },
+          "grouping": {
+            "additionalProperties": false,
+            "default": {
+              "gap_seconds": null,
+              "max_chars": null,
+              "max_lines": 2,
+              "max_words": null,
+              "unit": "phrase"
+            },
+            "properties": {
+              "gap_seconds": {
+                "anyOf": [
+                  {
+                    "maximum": 4,
+                    "minimum": 0,
+                    "type": "number"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "default": null
+              },
+              "max_chars": {
+                "anyOf": [
+                  {
+                    "maximum": 160,
+                    "minimum": 8,
+                    "type": "integer"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "default": null
+              },
+              "max_lines": {
+                "default": 2,
+                "enum": [
+                  1,
+                  2
+                ],
+                "type": "number"
+              },
+              "max_words": {
+                "anyOf": [
+                  {
+                    "maximum": 24,
+                    "minimum": 1,
+                    "type": "integer"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "default": null
+              },
+              "unit": {
+                "default": "phrase",
+                "enum": [
+                  "word",
+                  "phrase",
+                  "sentence"
+                ],
+                "type": "string"
+              }
+            },
+            "type": "object"
+          },
+          "highlight": {
+            "default": "active_word",
+            "enum": [
+              "none",
+              "active_word",
+              "karaoke"
+            ],
+            "type": "string"
+          },
+          "highlight_color": {
+            "$ref": "#/properties/generations/items/properties/caption_style/anyOf/0/properties/color",
+            "default": "#FFD700"
+          },
+          "italic": {
+            "default": false,
+            "type": "boolean"
+          },
+          "margin_h": {
+            "default": 0.06,
+            "maximum": 0.4,
+            "minimum": 0,
+            "type": "number"
+          },
+          "margin_v": {
+            "anyOf": [
+              {
+                "const": "auto",
+                "type": "string"
+              },
+              {
+                "maximum": 0.45,
+                "minimum": 0,
+                "type": "number"
+              }
+            ],
+            "default": "auto"
+          },
+          "schema_version": {
+            "const": "1.0",
+            "default": "1.0",
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      {
+        "type": "null"
+      }
+    ]
+  },
+  "created_at": {
+    "format": "date-time",
+    "type": "string"
+  },
+  "credits": {
+    "description": "Credits charged. Zero when your own provider key or the free allowance paid.",
+    "type": [
+      "number",
+      "null"
+    ]
+  },
+  "error": {
+    "description": "Why it failed. Null otherwise.",
+    "type": [
+      "string",
+      "null"
+    ]
+  },
+  "id": {
+    "format": "uuid",
+    "type": "string"
+  },
+  "model": {
+    "description": "The model id it was made with (`GET /v1/models`).",
+    "type": "string"
+  },
+  "object": {
+    "const": "generation",
+    "type": "string"
+  },
+  "output_url": {
+    "anyOf": [
+      {
+        "format": "uri",
+        "type": "string"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "description": "The finished file, once `ready`. A signed link that works for about an hour; read the generation again for a fresh one."
+  },
+  "paid_by": {
+    "description": "Who paid: \"credits\", \"house\" (the free allowance), \"server\" (a server that charges nothing), or the vendor of your own key (\"replicate\", \"fal\", …).",
+    "type": [
+      "string",
+      "null"
+    ]
+  },
+  "prompt": {
+    "type": "string"
+  },
+  "ready_in_seconds": {
+    "description": "Roughly how long an unfinished generation has left; 0 means past its usual time.",
+    "type": [
+      "number",
+      "null"
+    ]
+  },
+  "recipe_id": {
+    "anyOf": [
+      {
+        "$ref": "#/properties/generations/items/properties/id"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "description": "The recipe it was made with, if any."
+  },
+  "refined_from": {
+    "anyOf": [
+      {
+        "format": "uuid",
+        "type": "string"
+      },
+      {
+        "type": "null"
+      }
+    ]
+  },
+  "stalled": {
+    "type": "boolean"
+  },
+  "status": {
+    "description": "`ready` and `failed` are final.",
+    "enum": [
+      "queued",
+      "generating",
+      "ready",
+      "failed"
+    ],
+    "type": "string"
+  },
+  "thumbnail_url": {
+    "anyOf": [
+      {
+        "$ref": "#/properties/generations/items/properties/output_url/anyOf/0"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "description": "A small still of the result, for a grid. Null for audio and while it works."
+  },
+  "type": {
+    "description": "What was made. New values may be added; treat an unknown one as opaque.",
+    "enum": [
+      "image",
+      "clip",
+      "voiceover",
+      "music",
+      "tool"
+    ],
+    "type": "string"
+  },
+  "vendor_phase": {
+    "anyOf": [
+      {
+        "enum": [
+          "queued",
+          "running"
+        ],
+        "type": "string"
+      },
+      {
+        "type": "null"
+      }
+    ]
+  }
+}

addedOutput schema / properties / generations / items / required

Added value: +[
+  "object",
+  "id",
+  "type",
+  "status",
+  "model",
+  "prompt",
+  "aspect_ratio",
+  "output_url",
+  "thumbnail_url",
+  "credits",
+  "paid_by",
+  "error",
+  "ready_in_seconds",
+  "recipe_id",
+  "created_at",
+  "app_url",
+  "refined_from",
+  "caption_style",
+  "vendor_phase",
+  "stalled"
+]

First observedOct 15, 2026

TDQS

C2.9/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=false, idempotentHint=false, and destructiveHint=false, so the safety profile is largely covered. The description adds that a revision sourced from get_workflow_run is required, hinting at optimistic-concurrency semantics, but it never says what happens on a stale revision or whether the pause state is consumed. Useful hint, not a full disclosure.

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

Conciseness2/5

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

It is short, but the single sentence is malformed — the clause 'using its revision from get_workflow_run' is spliced mid-phrase, forcing the reader to parse it twice. Brevity here comes at the cost of comprehension rather than from tight editing.

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

Completeness3/5

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. Still, for a non-idempotent state-mutating run-control tool in a crowded family of run tools, the description omits what resume does to the run's state, error behavior on stale revisions, and how it differs from retry/rewind.

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 0% for both parameters, so the description must compensate. It does explain where 'revision' comes from (get_workflow_run), which is real added meaning beyond the bare integer type, but 'run_id' is left entirely implicit and the consequence of a mismatched revision is unstated.

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

Purpose3/5

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

The verb 'Resume' and resource 'workflow run' are present, and 'current pause or checkpoint' narrows the scope. But the sentence is grammatically broken ('using its revision from get_workflow_run a workflow run'), and it never distinguishes itself from close siblings such as retry_workflow_run, rewind_workflow_run, or cancel_workflow_run. An agent can guess the purpose but not confidently separate it from adjacent run-control tools.

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?

There is an implied trigger ('the current pause or checkpoint') and a stated prerequisite that the revision must come from get_workflow_run, which is genuine routing value. However, there is no explicit when-not guidance, and no statement of why one would resume rather than retry or rewind a run.

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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