Zambo AI Tools

Workflow Seal

workflow_seal

Idempotent

Seals a closed workflow for durable export. Requires the matching job session and an active pass. Never spends, captures, or starts a payment. The export remains a Zambo claim, not issuer authentication. Required arguments: workflow_id, _session_id.

Input Schema

Name	Required	Description	Default
`_ref`	No	Optional handover referral ID from your install link.
`action`	No	save with proof the paid snapshot or edit its post-save with proof branding.
`branding`	No
`_zambo_key`	No	Optional active Day Pass key bound to this exact job. Never place it in a URL or public log.
`_session_id`	Yes	Required owning job ID, identical to the ID used when the workflow was closed.
`workflow_id`	Yes	Required workflow_id returned by workflow_close.
`_caller_label`	No	Optional caller label recorded as a caller-reported claim in the receipt.	zambo-starter
`_caller_handle`	No	Opaque anonymous continuity handle returned during initialize. Reuse it across MCP sessions; it is not payment authorization.
`_continuity_ai_label`	No	Optional self-reported AI client label for the private continuity timeline. Zambo does not independently verify the client.
`workflow_manage_token`	No	Optional private capability returned once by workflow_close. Never share it in public.

Output Schema

Name	Required	Description
`ok`	Yes
`ids`	Yes
`next`	Yes
`tier`	No
`urls`	Yes
`error`	No
`graph`	No
`active`	No
`result`	Yes	The tool's observed JSON value or plain-text result.
`intents`	No
`next_up`	No
`payment`	No
`day_pass`	No
`today_url`	No
`expires_at`	No
`human_line`	Yes
`next_steps`	No
`daily_recap`	No
`renew_nudge`	No
`unlock_link`	No
`seconds_left`	No
`resume_status`	No
`resumed_result`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 28, 2026

changedInput schema / properties / action / description

Previous value: -"Seal the paid snapshot or edit its post-seal branding."New value: +"save with proof the paid snapshot or edit its post-save with proof branding."

Changed2 schema fields changedOct 25, 2026

addedInput schema / properties / _caller_handle

Added value: +{
+  "description": "Opaque anonymous continuity handle returned during initialize. Reuse it across MCP sessions; it is not payment authorization.",
+  "maxLength": 64,
+  "type": "string"
+}

addedInput schema / properties / _caller_label / default
```
Added value: +"zambo-starter"
```

Changed1 schema field changedOct 23, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-25"New value: +"draft-zambo-aer1-26"
```
Changed1 schema field changedOct 22, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-24"New value: +"draft-zambo-aer1-25"
```
Changed1 schema field changedOct 20, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-23"New value: +"draft-zambo-aer1-24"
```
Changed1 schema field changedOct 19, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-22"New value: +"draft-zambo-aer1-23"
```
Changed1 schema field changedOct 18, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-21"New value: +"draft-zambo-aer1-22"
```
Changed1 schema field changedOct 18, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-20"New value: +"draft-zambo-aer1-21"
```
Changed1 schema field changedOct 17, 2026
- addedOutput schema / properties / next_steps
```
Added value: +{
+  "items": {},
+  "minItems": 1,
+  "type": "array"
+}
```

Changed26 schema fields changedOct 17, 2026

addedInput schema / properties / _ref

Added value: +{
+  "description": "Optional handover referral ID from your install link.",
+  "format": "uuid",
+  "type": "string"
+}

changedOutput schema / additionalProperties
```
Previous value: -falseNew value: +true
```
addedOutput schema / properties / active
```
Added value: +{
+  "type": "boolean"
+}
```
addedOutput schema / properties / daily_recap
```
Added value: +{
+  "type": "object"
+}
```
addedOutput schema / properties / day_pass
```
Added value: +{
+  "type": "object"
+}
```

addedOutput schema / properties / error

Added value: +{
+  "additionalProperties": true,
+  "anyOf": [
+    {
+      "required": [
+        "next_call"
+      ]
+    },
+    {
+      "required": [
+        "next_url"
+      ]
+    }
+  ],
+  "properties": {
+    "code": {
+      "type": "string"
+    },
+    "next_call": {
+      "additionalProperties": false,
+      "properties": {
+        "args": {
+          "type": "object"
+        },
+        "tool": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "tool",
+        "args"
+      ],
+      "type": "object"
+    },
+    "next_step": {
+      "type": "string"
+    },
+    "next_url": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "next_step"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / expires_at

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / graph

Added value: +{
+  "properties": {
+    "aer": {
+      "const": "draft-zambo-aer1-20"
+    },
+    "schema": {
+      "const": "zambo.graph/1"
+    }
+  },
+  "required": [
+    "schema",
+    "aer",
+    "nodes",
+    "edges",
+    "retries",
+    "sources",
+    "summary"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / human_line

Added value: +{
+  "maxLength": 200,
+  "pattern": "^[^\\r\\n]*$",
+  "type": "string"
+}

addedOutput schema / properties / ids

Added value: +{
+  "additionalProperties": {
+    "type": "string"
+  },
+  "type": "object"
+}

addedOutput schema / properties / intents

Added value: +{
+  "items": {
+    "type": "object"
+  },
+  "type": "array"
+}

addedOutput schema / properties / next

Added value: +{
+  "minLength": 1,
+  "type": "string"
+}

addedOutput schema / properties / next_up
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / ok
```
Added value: +{
+  "type": "boolean"
+}
```
addedOutput schema / properties / payment
```
Added value: +{
+  "type": "object"
+}
```
addedOutput schema / properties / renew_nudge
```
Added value: +{
+  "type": "object"
+}
```

addedOutput schema / properties / result / description

Added value: +"The tool's observed JSON value or plain-text result."

removedOutput schema / properties / result / oneOf

Removed value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "already_sealed": {
-        "type": "boolean"
-      },
-      "badge_url": {
-        "type": "string"
-      },
-      "branding": {
-        "additionalProperties": false,
-        "properties": {
-          "display_name": {
-            "type": "string"
-          },
-          "logo_asset_id": {
-            "type": [
-              "string",
-              "null"
-            ]
-          }
-        },
-        "required": [
-          "display_name",
-          "logo_asset_id"
-        ],
-        "type": "object"
-      },
-      "issuer_authenticated": {
-        "const": false,
-        "type": "boolean"
-      },
-      "pass": {
-        "additionalProperties": false,
-        "properties": {
-          "active": {
-            "type": "boolean"
-          },
-          "expires_at": {
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "session_bound": {
-            "const": true,
-            "type": "boolean"
-          }
-        },
-        "required": [
-          "active",
-          "expires_at",
-          "session_bound"
-        ],
-        "type": "object"
-      },
-      "pdf_url": {
-        "type": "string"
-      },
-      "sealed_at": {
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "sealed_snapshot": {
-        "additionalProperties": false,
-        "properties": {
-          "closed_receipt_id": {
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "count": {
-            "minimum": 0,
-            "type": "integer"
-          },
-          "merkle_root": {
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "receipts": {
-            "items": {
-              "additionalProperties": false,
-              "properties": {
-                "contextual_url": {
-                  "type": "string"
-                },
-                "id": {
-                  "type": "string"
-                },
-                "receipt_url": {
-                  "type": "string"
-                }
-              },
-              "required": [
-                "id",
-                "receipt_url",
-                "contextual_url"
-              ],
-              "type": "object"
-            },
-            "type": "array"
-          }
-        },
-        "required": [
-          "count",
-          "merkle_root",
-          "closed_receipt_id",
-          "receipts"
-        ],
-        "type": "object"
-      },
-      "status": {
-        "const": "sealed",
-        "type": "string"
-      },
-      "verification_status": {
-        "const": "not_verified",
-        "type": "string"
-      },
-      "workflow_id": {
-        "type": "string"
-      },
-      "workflow_url": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "status",
-      "already_sealed",
-      "workflow_id",
-      "workflow_url",
-      "sealed_at",
-      "sealed_snapshot",
-      "pass",
-      "branding",
-      "badge_url",
-      "pdf_url",
-      "verification_status",
-      "issuer_authenticated"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "next": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "status": {
-        "const": "day_pass_required",
-        "type": "string"
-      },
-      "workflow_id": {
-        "type": "string"
-      },
-      "workflow_url": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "status",
-      "workflow_id",
-      "workflow_url",
-      "next"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "error": {
-        "additionalProperties": false,
-        "properties": {
-          "code": {
-            "type": "string"
-          },
-          "message": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "code",
-          "message"
-        ],
-        "type": "object"
-      },
-      "status": {
-        "const": "error",
-        "type": "string"
-      },
-      "workflow_id": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "status",
-      "error"
-    ],
-    "type": "object"
-  }
-]

addedOutput schema / properties / resume_status
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / resumed_result
```
Added value: +{
+  "type": "object"
+}
```

addedOutput schema / properties / seconds_left

Added value: +{
+  "type": [
+    "number",
+    "null"
+  ]
+}

addedOutput schema / properties / tier

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / today_url
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / unlock_link

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / urls

Added value: +{
+  "additionalProperties": {
+    "type": "string"
+  },
+  "type": "object"
+}

changedOutput schema / required

Previous value: -[
-  "result"
-]New value: +[
+  "result",
+  "ok",
+  "human_line",
+  "next",
+  "ids",
+  "urls"
+]

Changed3 schema fields changedOct 12, 2026

addedInput schema / allOf

Added value: +[
+  {
+    "if": {
+      "properties": {
+        "action": {
+          "const": "branding"
+        }
+      },
+      "required": [
+        "action"
+      ]
+    },
+    "then": {
+      "required": [
+        "workflow_manage_token"
+      ]
+    }
+  }
+]

changedInput schema / properties / workflow_manage_token / maxLength
```
Previous value: -128New value: +2048
```
removedInput schema / properties / workflow_manage_token / minLength
```
Removed value: -32
```

Changed2 schema fields changedOct 12, 2026

addedInput schema / properties / action

Added value: +{
+  "description": "Seal the paid snapshot or edit its post-seal branding.",
+  "enum": [
+    "seal",
+    "branding"
+  ],
+  "type": "string"
+}

addedInput schema / properties / branding

Added value: +{
+  "properties": {
+    "display_name": {
+      "maxLength": 80,
+      "type": "string"
+    },
+    "logo_asset_id": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

Changed5 schema fields changedOct 12, 2026

removedOutput schema / properties / result / additionalProperties
```
Removed value: -false
```

addedOutput schema / properties / result / oneOf

Added value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "already_sealed": {
+        "type": "boolean"
+      },
+      "badge_url": {
+        "type": "string"
+      },
+      "branding": {
+        "additionalProperties": false,
+        "properties": {
+          "display_name": {
+            "type": "string"
+          },
+          "logo_asset_id": {
+            "type": [
+              "string",
+              "null"
+            ]
+          }
+        },
+        "required": [
+          "display_name",
+          "logo_asset_id"
+        ],
+        "type": "object"
+      },
+      "issuer_authenticated": {
+        "const": false,
+        "type": "boolean"
+      },
+      "pass": {
+        "additionalProperties": false,
+        "properties": {
+          "active": {
+            "type": "boolean"
+          },
+          "expires_at": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "session_bound": {
+            "const": true,
+            "type": "boolean"
+          }
+        },
+        "required": [
+          "active",
+          "expires_at",
+          "session_bound"
+        ],
+        "type": "object"
+      },
+      "pdf_url": {
+        "type": "string"
+      },
+      "sealed_at": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "sealed_snapshot": {
+        "additionalProperties": false,
+        "properties": {
+          "closed_receipt_id": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "count": {
+            "minimum": 0,
+            "type": "integer"
+          },
+          "merkle_root": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "receipts": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "contextual_url": {
+                  "type": "string"
+                },
+                "id": {
+                  "type": "string"
+                },
+                "receipt_url": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "id",
+                "receipt_url",
+                "contextual_url"
+              ],
+              "type": "object"
+            },
+            "type": "array"
+          }
+        },
+        "required": [
+          "count",
+          "merkle_root",
+          "closed_receipt_id",
+          "receipts"
+        ],
+        "type": "object"
+      },
+      "status": {
+        "const": "sealed",
+        "type": "string"
+      },
+      "verification_status": {
+        "const": "not_verified",
+        "type": "string"
+      },
+      "workflow_id": {
+        "type": "string"
+      },
+      "workflow_url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "status",
+      "already_sealed",
+      "workflow_id",
+      "workflow_url",
+      "sealed_at",
+      "sealed_snapshot",
+      "pass",
+      "branding",
+      "badge_url",
+      "pdf_url",
+      "verification_status",
+      "issuer_authenticated"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "next": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "status": {
+        "const": "day_pass_required",
+        "type": "string"
+      },
+      "workflow_id": {
+        "type": "string"
+      },
+      "workflow_url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "status",
+      "workflow_id",
+      "workflow_url",
+      "next"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "error": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code",
+          "message"
+        ],
+        "type": "object"
+      },
+      "status": {
+        "const": "error",
+        "type": "string"
+      },
+      "workflow_id": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "status",
+      "error"
+    ],
+    "type": "object"
+  }
+]

removedOutput schema / properties / result / properties

Removed value: -{
-  "already_sealed": {
-    "type": "boolean"
-  },
-  "badge_url": {
-    "format": "uri",
-    "type": "string"
-  },
-  "branding": {
-    "additionalProperties": false,
-    "properties": {
-      "display_name": {
-        "type": "string"
-      },
-      "logo_asset_id": {
-        "type": [
-          "string",
-          "null"
-        ]
-      }
-    },
-    "required": [
-      "display_name",
-      "logo_asset_id"
-    ],
-    "type": "object"
-  },
-  "issuer_authenticated": {
-    "const": false,
-    "type": "boolean"
-  },
-  "pass": {
-    "additionalProperties": false,
-    "properties": {
-      "active": {
-        "type": "boolean"
-      },
-      "expires_at": {
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "session_bound": {
-        "const": true,
-        "type": "boolean"
-      }
-    },
-    "required": [
-      "active",
-      "expires_at",
-      "session_bound"
-    ],
-    "type": "object"
-  },
-  "pdf_url": {
-    "format": "uri",
-    "type": "string"
-  },
-  "sealed_at": {
-    "format": "date-time",
-    "type": "string"
-  },
-  "sealed_snapshot": {
-    "additionalProperties": false,
-    "properties": {
-      "closed_receipt_id": {
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "count": {
-        "minimum": 0,
-        "type": "integer"
-      },
-      "merkle_root": {
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "receipts": {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "contextual_url": {
-              "format": "uri",
-              "type": "string"
-            },
-            "id": {
-              "type": "string"
-            },
-            "receipt_url": {
-              "format": "uri",
-              "type": "string"
-            }
-          },
-          "required": [
-            "id",
-            "receipt_url",
-            "contextual_url"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      }
-    },
-    "required": [
-      "count",
-      "merkle_root",
-      "closed_receipt_id",
-      "receipts"
-    ],
-    "type": "object"
-  },
-  "status": {
-    "const": "sealed",
-    "type": "string"
-  },
-  "verification_status": {
-    "const": "not_verified",
-    "type": "string"
-  },
-  "workflow_id": {
-    "format": "uuid",
-    "type": "string"
-  },
-  "workflow_url": {
-    "format": "uri",
-    "type": "string"
-  }
-}

removedOutput schema / properties / result / required

Removed value: -[
-  "status",
-  "already_sealed",
-  "workflow_id",
-  "workflow_url",
-  "sealed_at",
-  "sealed_snapshot",
-  "pass",
-  "branding",
-  "badge_url",
-  "pdf_url",
-  "verification_status",
-  "issuer_authenticated"
-]

removedOutput schema / properties / result / type
```
Removed value: -"object"
```

AddedOct 12, 2026

TDQS

A3.7/5.0

Behavior4/5

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

Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=false. The description adds useful behavioral context beyond those annotations: it clarifies that the operation never spends or captures payment and that the export remains a Zambo claim rather than issuer authentication.

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

Conciseness4/5

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

The description is short and front-loads the core action and prerequisites. The final sentence restating required arguments is slightly redundant with the schema but still useful for quick scanning.

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?

Given the output schema and 90% schema description coverage, return values and most parameter details need not be repeated. The description covers the core seal operation and safety semantics, though it omits the optional branding mode exposed by the action enum.

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 90%, so the schema already documents most parameters well. The description repeats the two required arguments but does not add meaning beyond the schema for action, branding, or the conditional workflow_manage_token.

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?

The description states a specific verb and resource: 'Seals a closed workflow for durable export.' It makes the outcome clear, but it does not explicitly differentiate this from the sibling workflow_close tool, which is only implied through the schema's workflow_id note.

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?

It gives prerequisites ('Requires the matching job session and an active pass') but does not state when to use this versus workflow_close or other siblings. Usage is implied rather than explicitly guided.

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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