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Kalpana Batch

by one.kalpana
OverviewDiscussionsAdmin

Get one job and its file

get_job
Read-onlyIdempotent

Returns one job's status, modifications and, once it has rendered, its file: url, file name, size and dimensions. It answers at once; use it after create_job or run_job answered with a job still rendering, a few seconds apart. A pending job has nothing running and comes back at once; run_job starts it. For a batch's files use get_batch_outputs. An unknown jobId, or one from another workspace, returns Job not found. Needs batches:read.

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": {
      "jobId": "<jobId>"
    },
    "name": "get_job"
  }
}

Input Schema

NameRequiredDescriptionDefault
jobIdYesJob ID from create_job, run_job or get_batch_jobs

Output Schema

NameRequiredDescriptionDefault
idYesjobId for run_job, get_job and update_job
fileYesThe rendered file; null until the job succeeds
flowYesThe flow it renders as a video, if it does
pageYesThe page it renders; null for a video
batchYesThe batch it is in; null for a job on its own
errorYesWhy the render failed
outputYes
statusYespending waits for run_batch, processing is rendering, success has rendered, failed has a render error, cancelled was stopped by cancel_batch or cancel_job (final, not charged)
templateYes
creditCostYesCredits the render spends when it succeeds
modificationsYesThe values it renders, by layer; null for a job made in the Kalpana app

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed20 schema fields changed
    • addedOutput schema / properties / batch
      Added value: +{
+  "anyOf": [
+    {
+      "format": "uuid",
+      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$",
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The batch it is in; null for a job on its own"
+}
    • removedOutput schema / properties / batchId
      Removed value: -{
-  "anyOf": [
-    {
-      "format": "uuid",
-      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$",
-      "type": "string"
-    },
-    {
-      "type": "null"
-    }
-  ],
-  "description": "The batch it joined; null for a job on its own"
-}
    • addedOutput schema / properties / file
      Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "contentType": {
+          "type": "string"
+        },
+        "creativeId": {
+          "format": "uuid",
+          "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$",
+          "type": "string"
+        },
+        "fileName": {
+          "type": "string"
+        },
+        "height": {
+          "anyOf": [
+            {
+              "maximum": 9007199254740991,
+              "minimum": -9007199254740991,
+              "type": "integer"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "sizeBytes": {
+          "maximum": 9007199254740991,
+          "minimum": 0,
+          "type": "integer"
+        },
+        "url": {
+          "description": "Link to the rendered file",
+          "type": "string"
+        },
+        "width": {
+          "anyOf": [
+            {
+              "maximum": 9007199254740991,
+              "minimum": -9007199254740991,
+              "type": "integer"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "required": [
+        "creativeId",
+        "url",
+        "fileName",
+        "contentType",
+        "sizeBytes",
+        "width",
+        "height"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The rendered file; null until the job succeeds"
+}
    • addedOutput schema / properties / flow
      Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "name"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The flow it renders as a video, if it does"
+}
    • removedOutput schema / properties / flowId
      Removed value: -{
-  "anyOf": [
-    {
-      "format": "uuid",
-      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$",
-      "type": "string"
-    },
-    {
-      "type": "null"
-    }
-  ]
-}
    • changedOutput schema / properties / id / description
      Previous value: -"jobId for run_job and get_job"New value: +"jobId for run_job, get_job and update_job"
    • addedOutput schema / properties / modifications
      Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The values it renders, by layer; null for a job made in the Kalpana app"
+}
    • addedOutput schema / properties / output / additionalProperties
      Added value: +false
    • removedOutput schema / properties / output / anyOf
      Removed value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "contentType": {
-        "type": "string"
-      },
-      "creativeId": {
-        "format": "uuid",
-        "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$",
-        "type": "string"
-      },
-      "fileName": {
-        "type": "string"
-      },
-      "height": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": -9007199254740991,
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "sizeBytes": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "url": {
-        "description": "Link to the rendered file",
-        "type": "string"
-      },
-      "width": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": -9007199254740991,
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "required": [
-      "creativeId",
-      "url",
-      "fileName",
-      "contentType",
-      "sizeBytes",
-      "width",
-      "height"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]
    • removedOutput schema / properties / output / description
      Removed value: -"The rendered file; null until the job succeeds"
    • addedOutput schema / properties / output / properties
      Added value: +{
+  "format": {
+    "description": "File format the job renders to",
+    "enum": [
+      "png",
+      "jpeg",
+      "webp",
+      "pdf",
+      "mp4",
+      "gif",
+      "webm",
+      "mov"
+    ],
+    "type": "string"
+  },
+  "kind": {
+    "description": "image for still renders (png, jpeg, webp, pdf); video for mp4, gif, webm or mov",
+    "enum": [
+      "image",
+      "video"
+    ],
+    "type": "string"
+  }
+}
    • addedOutput schema / properties / output / required
      Added value: +[
+  "format",
+  "kind"
+]
    • addedOutput schema / properties / output / type
      Added value: +"object"
    • removedOutput schema / properties / outputFormat
      Removed value: -{
-  "description": "File format the job renders to",
-  "enum": [
-    "png",
-    "jpeg",
-    "webp",
-    "pdf",
-    "mp4",
-    "gif",
-    "webm",
-    "mov"
-  ],
-  "type": "string"
-}
    • removedOutput schema / properties / outputKind
      Removed value: -{
-  "description": "image for still renders (png, jpeg, webp, pdf); video for mp4, gif, webm or mov",
-  "enum": [
-    "image",
-    "video"
-  ],
-  "type": "string"
-}
    • addedOutput schema / properties / page
      Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "name"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The page it renders; null for a video"
+}
    • removedOutput schema / properties / pageId
      Removed value: -{
-  "anyOf": [
-    {
-      "format": "uuid",
-      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$",
-      "type": "string"
-    },
-    {
-      "type": "null"
-    }
-  ]
-}
    • addedOutput schema / properties / template
      Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "name"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}
    • removedOutput schema / properties / templateId
      Removed value: -{
-  "anyOf": [
-    {
-      "format": "uuid",
-      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$",
-      "type": "string"
-    },
-    {
-      "type": "null"
-    }
-  ]
-}
    • changedOutput schema / required
      Previous value: -[
-  "id",
-  "status",
-  "batchId",
-  "templateId",
-  "pageId",
-  "flowId",
-  "outputKind",
-  "outputFormat",
-  "creditCost",
-  "error",
-  "output"
-]New value: +[
+  "id",
+  "status",
+  "template",
+  "page",
+  "flow",
+  "batch",
+  "modifications",
+  "output",
+  "creditCost",
+  "error",
+  "file"
+]
  2. Added

TDQS

A4.9/5.0
Behavior5/5

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

Beyond the readOnly/idempotent annotations it discloses that the call is non-blocking ('answers at once'), the exact failure mode and message for an unknown or cross-workspace jobId, and the required permission scope batches:read. That is materially more than the annotations provide.

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?

Front-loaded with the return content, then polling guidance, then alternatives, then error/auth notes. Every sentence carries distinct information; there is no filler or repetition of the schema.

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

Completeness5/5

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

For a single-parameter read tool with full annotations and an output schema, nothing an agent needs is missing: it knows what comes back, when to call, how often to poll, what a pending job means, and what error to expect.

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

Parameters4/5

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

Schema coverage is 100% and the single jobId parameter is fully described in the schema, so the baseline is 3. The description adds value by stating that a jobId from another workspace is treated as 'Job not found', which clarifies the identifier's scoping semantics beyond the pattern/format constraints.

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

Purpose5/5

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

States a specific verb and resource ('Returns one job's status, modifications and ... its file') and enumerates the returned fields (url, file name, size, dimensions). It explicitly separates itself from get_batch_outputs and get_batch_jobs, so an agent can pick it without opening any schema.

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

Usage Guidelines5/5

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

Gives concrete when-to-use guidance: call it after create_job or run_job returns a job that is still rendering, polling a few seconds apart. It also names the alternative for batch files (get_batch_outputs) and clarifies that a pending job will not progress without run_job.

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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