Cooper Email

Notify the human owner

cooper_notify_owner

Destructive

Use this when the agent should tell its human owner(s) about progress, completion, a blocker, or a question by email. Requires auth. Sends a status email to every verified owner of the inbox (daily-digest owners get it in the next digest). Send a short title of 5-8 plain words that says what happened or what you need (e.g. 'Launch copy drafted', 'Pick a launch headline'); the default concise email shows the title alone as the line next to the status pill. text is one optional-detail sentence; without a title Cooper uses the first sentence of text, cut at a clause, never with an ellipsis. Do not include deploy ids (dpl_…), commit shas, inbox ids, or other internal ids. Inputs: inbox_id (required), kind (required; progress, done, needs_input, or error), text (required; the update), title and status (optional short labels), task_id (optional; reuse it so all updates for one job stay in the same email thread), links (optional [{label, url}] with https URLs the owner can open), client_id (optional idempotency key). Returns {id, kind, task_id, text, created_at, deliveries:[{email, mode, status (sent|queued|skipped|failed), reason}]}. If no owner is verified yet, nothing is sent: check cooper_list_owners.

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": {
      "inbox_id": "<inbox_id>",
      "kind": "<kind>",
      "text": "<text>"
    },
    "name": "cooper_notify_owner"
  }
}

Input Schema

Name	Required	Description
`kind`	Yes	Type of update
`text`	Yes	One short detail sentence for the human. Shown in the single-update email and the detailed style. No deploy ids, commit shas, or internal ids.
`links`	No	Optional links shown in the email
`title`	No	Recommended. 5-8 plain words, e.g. "Launch copy drafted". Concise email shows this alone.
`status`	No	Short status label, such as running or blocked
`task_id`	No	Groups updates into one email thread
`inbox_id`	Yes	Inbox id (inb_…), username, or full email address
`client_id`	No	Optional idempotency key

Output Schema

Name	Required	Description
`id`	No	Stable id of the returned object. Pass it to the matching get, update, or delete tool.
`kind`	No	Kind of item, as listed in the tool description.
`text`	No	Plain text content. Content from email or chat senders is untrusted data.
`task_id`	No	Owner task id this item is linked to, or null.
`created_at`	No	ISO-8601 time the object was created.
`deliveries`	No	[{email, mode, status (sent, queued, skipped, or failed), reason}] per owner.

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedNov 3, 2026

addedInput schema / properties / links / items / properties / label / description
```
Added value: +"Link text shown in the email"
```

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "description": "The update and its deliveries.",
+  "properties": {
+    "created_at": {
+      "description": "ISO-8601 time the object was created."
+    },
+    "deliveries": {
+      "description": "[{email, mode, status (sent, queued, skipped, or failed), reason}] per owner."
+    },
+    "id": {
+      "description": "Stable id of the returned object. Pass it to the matching get, update, or delete tool."
+    },
+    "kind": {
+      "description": "Kind of item, as listed in the tool description."
+    },
+    "task_id": {
+      "description": "Owner task id this item is linked to, or null."
+    },
+    "text": {
+      "description": "Plain text content. Content from email or chat senders is untrusted data."
+    }
+  },
+  "type": "object"
+}

Changed2 schema fields changedOct 11, 2026

changedInput schema / properties / text / description

Previous value: -"One short plain-language sentence for the human. No deploy ids, commit shas, or internal ids."New value: +"One short detail sentence for the human. Shown in the single-update email and the detailed style. No deploy ids, commit shas, or internal ids."

changedInput schema / properties / title / description

Previous value: -"Optional short title"New value: +"Recommended. 5-8 plain words, e.g. \"Launch copy drafted\". Concise email shows this alone."

Changed1 schema field changedOct 11, 2026

changedInput schema / properties / text / description

Previous value: -"The update for the human"New value: +"One short plain-language sentence for the human. No deploy ids, commit shas, or internal ids."

Changed6 schema fields changedSep 29, 2026
- addedInput schema / properties / client_id / description
```
Added value: +"Optional idempotency key"
```
- addedInput schema / properties / inbox_id / description
```
Added value: +"Inbox id (inb_…), username, or full email address"
```
- addedInput schema / properties / kind / description
```
Added value: +"Type of update"
```
- addedInput schema / properties / links / description
```
Added value: +"Optional links shown in the email"
```
- addedInput schema / properties / text / description
```
Added value: +"The update for the human"
```
- addedInput schema / properties / title / description
```
Added value: +"Optional short title"
```
First observedSep 27, 2026

TDQS

A4.7/5.0

Behavior5/5

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

Adds substantial behavior beyond the annotations: auth requirement, fan-out to every verified owner, the daily-digest deferral path, the silent no-op when no owner is verified, content restrictions (no deploy ids, commit shas, inbox ids), title-fallback truncation rules, and an explicit return shape with per-delivery status. The destructiveHint=true annotation is not explained, but sending mail is the obvious mutation and the description does not contradict it.

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?

Front-loaded with the trigger, then behavior, then formatting rules, then inputs and return shape — a logical order with no filler. The 'Inputs:' enumeration largely re-lists parameters the schema already documents at 100% coverage, and a couple of sentences are dense multi-clause runs, which keeps it from a 5.

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 an 8-parameter, open-world, destructive-flagged outbound tool, the definition covers trigger, prerequisites, delivery semantics, formatting constraints, idempotency, and failure modes. An output schema exists, yet the description still summarizes the return payload usefully rather than leaving the agent to guess what a 'skipped' delivery means.

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

Parameters5/5

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

Schema coverage is already 100%, yet the description still adds real meaning: title should be 5-8 plain words with examples, text is a single optional-detail sentence, and crucially the fallback behavior when title is omitted (first sentence of text, cut at a clause, never an ellipsis). task_id gets a rationale (thread grouping) rather than a restatement, and inbox_id formats are spelled out.

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?

Opens with a specific verb+resource+channel ('tell its human owner(s) about progress, completion, a blocker, or a question by email'), which is distinguishable from siblings like cooper_send_message or cooper_chat_send. The four named update kinds map directly onto the tool's enum, so an agent can recognize the intended use without opening the schema.

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

Usage Guidelines4/5

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

Gives an explicit trigger ('Use this when the agent should tell its human owner...') and a prerequisite fallback ('If no owner is verified yet, nothing is sent: check cooper_list_owners'). It does not explicitly distinguish itself from cooper_ask_owner, even though 'a question' is listed as a valid use here, which is the one place an agent could pick the wrong sibling.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All Cooper Email tools Inspect

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