Well

Assign missing-invoice owners

well_assign_missing_invoice_owners

Destructive

Set the owner SET of the missing-invoice TRANSACTIONS you name — the only write for missing-invoice ownership.

REQUIRED: transaction_ids — the settled lines still missing a supplier invoice, from well_list_missing_invoice_owners. owner_person_ids — the people who together owe those invoices; pass an EMPTY array to clear the owners.

Ownership is per TRANSACTION and is a SET, not one owner and not a card rule. The write REPLACES the owner set on every named transaction: the people you send become its owners and anyone not sent is removed. Assigning several people to a (counterparty × month) gap creates ONE proof task per distinct person, and ONE supplier invoice resolves every owner's task for that gap — the fan-out is for accountability, not for N separate collections. Tell the user this plainly.

Each person_id must already be a member of the workspace (get them with well_query_records on people). A person outside the workspace is refused (refusal_reason NOT_FOUND), not silently dropped.

Closed periods are frozen: a transaction whose fiscal month already closed refuses the whole batch (refusal_reason CLOSE_OWNER_PERIOD_FROZEN) rather than rewriting a committed close. A transaction id the workspace does not own refuses the batch too (refusal_reason NOT_FOUND).

Input Schema

TableJSON Schema

Name	Required	Description
`workspace_id`	No	Target workspace. Omit when the token authorizes one workspace. Required when it authorizes several — a write lands in exactly one workspace and this call would not say which.
`conversation_id`	No	The conversation id returned by the previous Well result, in its meta under well/conversation_id, in its structuredContent, or in its JSON text block. Pass it back on every call in the same conversation, including a call a card makes, so the chosen workspace and the earlier answers still apply. It decides the conversation on its own: nothing the host states about the session replaces it. Omit it only on the first call of a conversation.
`idempotency_key`	No	Optional client-supplied key. A retried write with the same key returns the original result instead of re-applying the operation.
`transaction_ids`	Yes	The missing-invoice transactions to assign, from well_list_missing_invoice_owners. At most 300 per call; split a longer list into several calls.
`workspace_scope`	No	Restrict this call to the family: the token's primary workspace plus the company workspaces under it that you are a member of. Unrelated authorized workspaces drop out of the read; row reads merge across the family, while a per-workspace figure still reports exactly one workspace.
`owner_person_ids`	Yes	The workspace people who together own these transactions' missing invoices; an empty array clears the owners.

Output Schema

TableJSON Schema

Name	Required	Description
`error`	No
`success`	Yes
`owner_count`	No	How many people own each of those transactions after the write.
`refusal_reason`	No	The WellError code when the write is refused — CLOSE_OWNER_PERIOD_FROZEN for a closed month, NOT_FOUND for a person outside the workspace or a transaction the workspace does not own.
`conversation_id`	No	The conversation this result belongs to. Pass it back as the conversation_id argument on every later Well call in the same conversation.
`newly_connected`	No	Tools that connected to this workspace since the last result and that no session was told about yet, oldest first. Present only when at least one tool is new. The connected-line rule says when to tell an entry; when it does, one line per entry, in the person's language: "<name> is connected.". Never fold several entries into one sentence. Each entry comes back once, on one result only: never repeat its line later.
`refusal_details`	No	Structured facts a refusal code alone does not carry — for CLOSE_OWNER_PERIOD_FROZEN, the frozen `{ fiscalYear, fiscalPeriod }`. A NOT_FOUND names the offending id in `error` instead.
`transaction_ids`	No	The distinct transactions whose owner set the write replaced.
`owner_person_ids`	No	The explicit owner set written to every named transaction; empty when the owners were cleared.
`transaction_count`	No	How many distinct transactions the write touched.
`conversation_id_note`	No	Present only when the server opened a fresh lane, stating that no choice recorded earlier was read.
`conversation_id_source`	No	Where the conversation id came from: the host's own request meta, the caller's argument, or a fresh lane the server opened.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 12, 2026

changedOutput schema / properties / newly_connected / description

Previous value: -"Tools that connected to this workspace since the last result and that no session was told about yet, oldest first. Present only when at least one tool is new. Start the reply with one line per entry, in the person's language: \"<name> is connected.\". Never fold several entries into one sentence. Each entry comes back once, on one result only: never repeat its line later."New value: +"Tools that connected to this workspace since the last result and that no session was told about yet, oldest first. Present only when at least one tool is new. The connected-line rule says when to tell an entry; when it does, one line per entry, in the person's language: \"<name> is connected.\". Never fold several entries into one sentence. Each entry comes back once, on one result only: never repeat its line later."

Changed1 schema field changedOct 8, 2026

addedInput schema / properties / workspace_scope

Added value: +{
+  "description": "Restrict this call to the family: the token's primary workspace plus the company workspaces under it that you are a member of. Unrelated authorized workspaces drop out of the read; row reads merge across the family, while a per-workspace figure still reports exactly one workspace.",
+  "enum": [
+    "family"
+  ],
+  "type": "string"
+}

Changed3 schema fields changedOct 6, 2026

changedInput schema / properties / transaction_ids / description

Previous value: -"The missing-invoice transactions to assign, from well_list_missing_invoice_owners."New value: +"The missing-invoice transactions to assign, from well_list_missing_invoice_owners. At most 300 per call; split a longer list into several calls."

addedInput schema / properties / transaction_ids / maxItems
```
Added value: +300
```

addedOutput schema / properties / newly_connected

Added value: +{
+  "description": "Tools that connected to this workspace since the last result and that no session was told about yet, oldest first. Present only when at least one tool is new. Start the reply with one line per entry, in the person's language: \"<name> is connected.\". Never fold several entries into one sentence. Each entry comes back once, on one result only: never repeat its line later.",
+  "items": {
+    "additionalProperties": false,
+    "properties": {
+      "name": {
+        "type": "string"
+      },
+      "service_id": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "name",
+      "service_id"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Changed4 schema fields changedSep 22, 2026

addedInput schema / properties / conversation_id

Added value: +{
+  "description": "The conversation id returned by the previous Well result, in its meta under well/conversation_id, in its structuredContent, or in its JSON text block. Pass it back on every call in the same conversation, including a call a card makes, so the chosen workspace and the earlier answers still apply. It decides the conversation on its own: nothing the host states about the session replaces it. Omit it only on the first call of a conversation.",
+  "type": "string"
+}

addedOutput schema / properties / conversation_id

Added value: +{
+  "description": "The conversation this result belongs to. Pass it back as the conversation_id argument on every later Well call in the same conversation.",
+  "type": "string"
+}

addedOutput schema / properties / conversation_id_note

Added value: +{
+  "description": "Present only when the server opened a fresh lane, stating that no choice recorded earlier was read.",
+  "type": "string"
+}

addedOutput schema / properties / conversation_id_source

Added value: +{
+  "description": "Where the conversation id came from: the host's own request meta, the caller's argument, or a fresh lane the server opened.",
+  "enum": [
+    "host_meta",
+    "argument",
+    "minted"
+  ],
+  "type": "string"
+}

AddedSep 8, 2026

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