Casefile

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answer

Provide an answer to a specific question in a case file, using the task key and question number. The first answer closes the question; later answers append to it.

Instructions

Answers a question of the same task. Any holder of a task token answers, in any task.

The first answer closes the question and later ones add to it; neither a question nor an answer changes the task status. The tracker builds the title from the question reference.

Input Schema

TableJSON Schema

Name	Required	Description
`key`	Yes	Task key `PROJECT-N`, case-insensitive; a previous key of a moved task addresses it as well. An unknown key is refused with `task_not_found`
`body`	No	Entry body in markdown, stored and returned as is. It holds what a successor needs to continue; file contents and long outputs stay outside it, represented by a pointer and the gist
`question_no`	Yes	Number of the `question` entry in the same task. Any other number is refused with `entry_fields_invalid`, `reason: unknown_entry` or `not_a_question`
`idempotency_key`	No	Retry key chosen by the caller, e.g. a UUID. A repeat with the same key and the same arguments returns the first result and creates nothing; the same key with other arguments is refused with `idempotency_key_reused`. A key is bound to the caller's token and kept for 24 hours

Output Schema

TableJSON Schema

Name	Required	Description
`no`	Yes	Entry number in the task's case; with the key it forms `TRK-42#12`
`seq`	Yes	Journal sequence number, usable as `after` of `wait_journal`
`title`	Yes	The title the tracker built, for entry types whose title is not sent (summary, answer, verdict, resolution, service entries); `null` when the caller sent the title
`author`	Yes
`task_key`	Yes
`created_at`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed15 schema fields changedv0.5.2Sep 25, 2026

changedInput schema / properties / body / description

Previous value: -"Тело записи в markdown; хранится и отдаётся как есть"New value: +"Entry body in markdown, stored and returned as is. It holds what a successor needs to continue; file contents and long outputs stay outside it, represented by a pointer and the gist"

changedInput schema / properties / idempotency_key / description

Previous value: -"Ключ повтора, который ты придумываешь сам (обычно UUID). Повтор вызова с тем же ключом и теми же аргументами отвечает первым результатом и второго объекта не заводит; тот же ключ с другими аргументами отклоняется. Ключ живёт в паре с твоим токеном и помнится 24 часа"New value: +"Retry key chosen by the caller, e.g. a UUID. A repeat with the same key and the same arguments returns the first result and creates nothing; the same key with other arguments is refused with `idempotency_key_reused`. A key is bound to the caller's token and kept for 24 hours"

changedInput schema / properties / key / description

Previous value: -"Ключ задачи, например `TRK-42`. Регистр не важен"New value: +"Task key `PROJECT-N`, case-insensitive; a previous key of a moved task addresses it as well. An unknown key is refused with `task_not_found`"

changedInput schema / properties / question_no / description

Previous value: -"Номер записи `question` в этой же задаче"New value: +"Number of the `question` entry in the same task. Any other number is refused with `entry_fields_invalid`, `reason: unknown_entry` or `not_a_question`"

removedInput schema / properties / question_no / examples
```
Removed value: -[
-  7
-]
```

removedOutput schema / $defs / AuthorKind

Removed value: -{
-  "description": "Кто именно сделал действие.\n\n`tracker` — сам трекер: этим родом подписаны служебные записи дела и строки,\nзаведённые командой первичной инициализации. У него нет подписи, потому что\nназывать себя по имени ему незачем: трекер в установке один.",
-  "enum": [
-    "agent",
-    "human",
-    "tracker"
-  ],
-  "title": "AuthorKind",
-  "type": "string"
-}

changedOutput schema / $defs / AuthorView / description

Previous value: -"Кто сделал действие: род и подпись. У самого трекера подписи нет."New value: +"Who acted: kind and signature. The tracker itself has no signature."

removedOutput schema / $defs / AuthorView / properties / kind / $ref
```
Removed value: -"#/$defs/AuthorKind"
```

addedOutput schema / $defs / AuthorView / properties / kind / description

Added value: +"Kind of author. `tracker` signs the service entries the tracker files itself"

addedOutput schema / $defs / AuthorView / properties / kind / enum
```
Added value: +[
+  "agent",
+  "human",
+  "tracker"
+]
```
addedOutput schema / $defs / AuthorView / properties / kind / type
```
Added value: +"string"
```

changedOutput schema / description

Previous value: -"Ответ подшивающего инструмента: чем запись адресуют, без самой записи.\n\n`title` непуст только там, где заголовок собрал трекер: у сводки, ответа, вердикта и\nрезолюции его не принимают вовсе (`app/domain/case.py`, `TITLED_ENTRY_TYPES`). Где\nзаголовок прислал агент, здесь стоит `null` — «в описи ровно то, что ты прислал»."New value: +"A filed entry, by its address rather than its content; the entry in full is\nreturned by `read_entries`."

addedOutput schema / properties / no / description

Added value: +"Entry number in the task's case; with the key it forms `TRK-42#12`"

addedOutput schema / properties / seq / description

Added value: +"Journal sequence number, usable as `after` of `wait_journal`"

addedOutput schema / properties / title / description

Added value: +"The title the tracker built, for entry types whose title is not sent (summary, answer, verdict, resolution, service entries); `null` when the caller sent the title"

First observedSep 23, 2026

TDQS

A3.7/5.0

Behavior4/5

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

All annotations are negative (false), so the description carries the full burden and it delivers: first answer closes the question while later answers append, neither question nor answer changes task status, and the tracker builds the title from the question reference. These are genuine behavioral disclosures beyond the annotations.

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?

Three sentences (~50 words), with the core purpose front-loaded in the first sentence and the two remaining sentences dense with scope and side-effect information. No filler or repetition of schema content.

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?

The description plus 100%-covered schema and output schema make the tool safely invocable on its own. However, the conceptual boundary between `answer` and conceptually adjacent siblings (`ask`, `add_verdict`, `add_entry`) is not clarified, so an agent working within the full 30-tool set still faces selection uncertainty.

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 100%, so the schema fully documents all four parameters, baseline 3 applies. The description adds only marginal param-adjacent context (task-token scope, question reference for the title) and no syntax or format details beyond the schema.

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?

States a specific verb+resource: 'Answers a question of the same task', with scope ('Any holder of a `task` token answers, in any task'). The claim that answers do not change task status implicitly distinguishes it from state-changing siblings like `resolve` and `close_task`, though no sibling is named explicitly.

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?

The use case is implied (respond to an open question in a task) and the 'does not change task status' line implicitly cautions against using it for state transitions. However, with 30 siblings including `ask`, `add_verdict`, and `add_entry`, no explicit when-to-use or when-not-to-use guidance is given, leaving selection largely to inference.

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