persona_update

Change the body, the age range or the slug of a persona. The revision that the agent read stops it from overwriting a change that it did not see.

Ask for a change to a persona. The agent changes only the parts that you name.

“The Loyalists say ‘my daily trainer’. Add that to their language.”

The agent reads the persona with persona_get, and then calls persona_update. The agent keeps the text that it read and adds the new words under the Language heading. You then see the new language, and the rest of the body as it was.

The job guide Describe a brand shows each step of the job.

Reference

Update a persona. Pass base_revision (from persona_get) — the update is rejected if the persona changed since you read it. Only the fields you pass are changed; pass body to replace the whole body of the persona (read it with persona_get, change it, send it back). Pass null for the body or an age bound to clear it. Suggested headings for the body: “## Profile”, “## Motivations”, “## Frictions”, “## Language”. Optionally rename the slug handle.

Input

Argument	Type	Required	Description
`age_max`	integer, 0 to 120 or null	no	New upper age bound. Pass null to clear it (“and older”).
`age_min`	integer, 0 to 120 or null	no	New lower age bound. Pass null to clear it (“and younger”).
`base_revision`	integer	yes	The revision you last read via persona_get. Guards against overwriting a concurrent edit.
`body`	string, 1 to 50000 characters or null	no	The new body of the persona, as one Markdown text. It replaces the whole body. Omit it to leave the body alone. Pass null to clear it.
`brand_name`	string	yes	The slug of the brand that owns the persona.
`description`	string, 1 to 500 characters	no	New one-line summary.
`name`	string, 1 to 120 characters	no	New display name.
`persona_name`	string	yes	The current persona slug identifying which to update.
`slug`	string, at most 120 characters	no	Optional new slug handle (a deliberate rename); normalized to kebab-case. Callers of the old handle must be updated.

Output

A successful call returns this object in structuredContent.

Field	Type	Always present	Description
`persona`	object	yes	The persona in full.
`persona.ageMax`	integer, 0 to 120 or null	yes	The highest age of the audience. `null` when the range has no upper bound.
`persona.ageMin`	integer, 0 to 120 or null	yes	The lowest age of the audience. `null` when the range has no lower bound.
`persona.body`	string or null	yes	The context of the persona, as one Markdown text. `null` when no body is written. Headings such as Profile, Motivations, Frictions and Language are the advice of the tools, and the body does not need them.
`persona.brandId`	string	yes	The brand that owns the persona (`brd_…`).
`persona.createdAt`	number	yes	Milliseconds since the Unix epoch, in UTC.
`persona.createdBy`	string	yes	The user who created the record (`usr_…`).
`persona.description`	string	yes	One line about the persona. An agent picks a persona on it.
`persona.id`	string	yes	The id of the persona (`psn_…`).
`persona.name`	string	yes	The display name.
`persona.revision`	number	yes	The version of the record. Each change adds 1. Send it as `base_revision` to update or delete the record.
`persona.slug`	string	yes	The handle of the persona. It is unique in its brand, not in the organization. The tools take it as `persona_name`.
`persona.updatedAt`	number or null	yes	Milliseconds since the Unix epoch, in UTC. `null` until the first change.

Failure codes

A failed call has isError set, and structuredContent.error holds one of these codes. Errors describes the shape of a failed call.

not_found
invalid_slug
invalid_age_range
revision_mismatch
slug_conflict
organization_unentitled
forbidden
invalid_request
internal_error

Scope

The token must hold brand:write. Auth & scopes lists each scope.

Annotations

A client reads these hints. A hint that the tool does not declare has the default value of the MCP specification.

Writes. The tool can change data.
Destructive. The tool can make a change that you cannot undo. A client can ask you to confirm before it calls the tool.
Not idempotent. A second call with the same arguments can change more.
Closed world. The tool reads and writes the data of AdCrunch only.

Example

The arguments:

{
  "base_revision": 1,
  "body": "## Profile\n\nRunners of 40 to 80 kilometres a week, ten years in, with one pair in rotation and one on the shelf.\n\n## Motivations\n\nThey want the same shoe again, and proof that it is the same. A resole keeps them running on a pair they trust.\n\n## Frictions\n\nThey fear the new model is worse than the one they know. A change of sole or of last reads to them as a risk, not as progress.\n\n## Language\n\nThey say \"my daily trainer\" and \"I got 900 out of the last pair\". They ask about the drop and the stack, never about the technology.",
  "brand_name": "acme",
  "persona_name": "loyalists"
}

The result, in structuredContent:

{
  "persona": {
    "ageMax": 45,
    "ageMin": 28,
    "body": "## Profile\n\nRunners of 40 to 80 kilometres a week, ten years in, with one pair in rotation and one on the shelf.\n\n## Motivations\n\nThey want the same shoe again, and proof that it is the same. A resole keeps them running on a pair they trust.\n\n## Frictions\n\nThey fear the new model is worse than the one they know. A change of sole or of last reads to them as a risk, not as progress.\n\n## Language\n\nThey say \"my daily trainer\" and \"I got 900 out of the last pair\". They ask about the drop and the stack, never about the technology.",
    "brandId": "brd_6a9c33",
    "createdAt": 1790000000000,
    "createdBy": "usr_4d8b12",
    "description": "Runners who already own a pair, and who buy the next one without looking at another brand.",
    "id": "psn_8c4a20",
    "name": "Loyalists",
    "revision": 2,
    "slug": "loyalists",
    "updatedAt": 1790086400000
  }
}