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Update brand voice

update_brand_voice

Set the default tone for the brand's Content Studio pages, or none to clear it. It applies to the next draft of every page; drafts already written are not rewritten.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
toneYes
brandYesBrand or study: its ID from list_brands, or its exact name. A partial name is refused.
idempotency_keyYesA unique key for this intended action. Reuse it with identical arguments when retrying: the write is not made again, and the reply is the first call's resource as saved (replayed: true) with current status; read tools show the resource's current state. Use a new key for another action.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataYes
generated_atYesRFC 3339 time the response was made.
schema_versionYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed6 schema fields changed
    • changedInput schema / properties / brand / description
      Previous value: -"Brand or study: its ID from list_brands, or its name."New value: +"Brand or study: its ID from list_brands, or its exact name. A partial name is refused."
    • changedInput schema / properties / idempotency_key / description
      Previous value: -"A unique key for this intended action. Reuse it with identical arguments when retrying; use a new key for another action."New value: +"A unique key for this intended action. Reuse it with identical arguments when retrying: the write is not made again, and the reply is the first call's resource as saved (replayed: true) with current status; read tools show the resource's current state. Use a new key for another action."
    • changedOutput schema / properties / data / properties / brand / description
      Previous value: -"The brand written to; null for brand setup before approval."New value: +"The brand written to; null for start_brand_setup, which has no brand yet."
    • changedOutput schema / properties / data / properties / cost / properties / readiness_scans / description
      Previous value: -"Site readiness scans used from the plan's monthly allowance."New value: +"Full site readiness scans started; counted for the month, with no monthly allowance."
    • addedOutput schema / properties / data / properties / created_at
      Added value: +{
      +  "description": "Set on a replay: when the original call was made.",
      +  "type": "string"
      +}
    • changedOutput schema / properties / data / properties / replayed / description
      Previous value: -"True when this repeats an earlier call with the same idempotency_key."New value: +"True when this repeats an earlier call with the same idempotency_key. The write is not made again: resource is as first saved, status, progress and message are current, and the read tools show the resource's current state."
  2. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "additionalProperties": false,
      +  "properties": {
      +    "data": {
      +      "additionalProperties": false,
      +      "properties": {
      +        "brand": {
      +          "additionalProperties": false,
      +          "description": "The brand written to; null for brand setup before approval.",
      +          "properties": {
      +            "id": {
      +              "type": "string"
      +            },
      +            "name": {
      +              "type": "string"
      +            },
      +            "url": {
      +              "description": "The brand's website, or empty when none is set.",
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "id",
      +            "name",
      +            "url"
      +          ],
      +          "type": [
      +            "null",
      +            "object"
      +          ]
      +        },
      +        "cost": {
      +          "additionalProperties": false,
      +          "description": "What the write used from the plan's capacity, allowances and model budget; null when nothing.",
      +          "properties": {
      +            "content_generations": {
      +              "description": "Content Studio generations used from the plan's allowance.",
      +              "type": "integer"
      +            },
      +            "model_budget": {
      +              "description": "Whether the call spends the organisation's AI model budget.",
      +              "type": "boolean"
      +            },
      +            "note": {
      +              "type": "string"
      +            },
      +            "prompt_capacity": {
      +              "description": "Active prompts added against the plan's prompt limit.",
      +              "type": "integer"
      +            },
      +            "queued_model_runs": {
      +              "description": "Answer collections queued; each uses model budget.",
      +              "type": "integer"
      +            },
      +            "readiness_checks": {
      +              "description": "Readiness re-checks used from the plan's monthly allowance.",
      +              "type": "integer"
      +            },
      +            "readiness_scans": {
      +              "description": "Site readiness scans used from the plan's monthly allowance.",
      +              "type": "integer"
      +            }
      +          },
      +          "required": [
      +            "model_budget",
      +            "content_generations",
      +            "readiness_scans",
      +            "readiness_checks",
      +            "prompt_capacity",
      +            "queued_model_runs",
      +            "note"
      +          ],
      +          "type": [
      +            "null",
      +            "object"
      +          ]
      +        },
      +        "message": {
      +          "description": "What happens next.",
      +          "type": "string"
      +        },
      +        "operation_id": {
      +          "description": "Pass to get_operation to follow the write.",
      +          "type": "string"
      +        },
      +        "poll_after_seconds": {
      +          "description": "While pending, how long to wait before calling get_operation; 0 otherwise.",
      +          "type": "integer"
      +        },
      +        "progress": {
      +          "additionalProperties": false,
      +          "description": "Set while the work runs.",
      +          "properties": {
      +            "done": {
      +              "type": "integer"
      +            },
      +            "message": {
      +              "type": "string"
      +            },
      +            "stage": {
      +              "type": "string"
      +            },
      +            "total": {
      +              "description": "0 when the total is not known.",
      +              "type": "integer"
      +            }
      +          },
      +          "required": [
      +            "stage",
      +            "done",
      +            "total",
      +            "message"
      +          ],
      +          "type": [
      +            "null",
      +            "object"
      +          ]
      +        },
      +        "replayed": {
      +          "description": "True when this repeats an earlier call with the same idempotency_key.",
      +          "type": "boolean"
      +        },
      +        "resource": {
      +          "additionalProperties": false,
      +          "properties": {
      +            "tone": {
      +              "description": "professional, confident, educational, conversational, executive, technical, or persuasive; empty when no default is set.",
      +              "type": "string"
      +            },
      +            "updated_at": {
      +              "description": "Empty when the tone was never set.",
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "tone",
      +            "updated_at"
      +          ],
      +          "type": "object"
      +        },
      +        "status": {
      +          "description": "completed: done. pending: saved, with work still running; call get_operation after poll_after_seconds. failed: the work after the write failed; message says why.",
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "operation_id",
      +        "status",
      +        "replayed",
      +        "brand",
      +        "resource",
      +        "progress",
      +        "poll_after_seconds",
      +        "message",
      +        "cost"
      +      ],
      +      "type": "object"
      +    },
      +    "generated_at": {
      +      "description": "RFC 3339 time the response was made.",
      +      "type": "string"
      +    },
      +    "schema_version": {
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "schema_version",
      +    "generated_at",
      +    "data"
      +  ],
      +  "type": "object"
      +}
  3. Added

TDQS

A3.9/5.0
Behavior4/5

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

Annotations already declare the safety profile (readOnlyHint=false, destructiveHint=false), so the bar is lower. The description adds genuinely useful behavior the annotations cannot convey: that setting 'none' clears the tone and that the change is forward-only, not retroactive. It does not mention the caller-supplied idempotency mechanism, but that is documented in the schema.

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?

Two sentences, no filler, with the primary action front-loaded and the non-retroactive caveat immediately after. Every clause carries information.

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?

With annotations covering the safety profile and an output schema covering return values, the description need only cover scope and semantics, which it does. The one remaining gap is any explicit routing versus sibling tools.

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

Parameters4/5

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

Schema coverage is 67% and the schema already documents brand and idempotency_key, so the baseline is 3. The description goes beyond the schema on the tone parameter by explaining that the 'none' enum value means 'clear it' — an enum member the schema lists without explanation.

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 and resource ('Set the default tone for the brand's Content Studio pages') and even covers the clearing case ('or none to clear it'). It is clear enough to distinguish from update_brand, though it never explicitly contrasts itself with any sibling.

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 description gives a real scope rule — it affects the next draft of every page and does not rewrite existing drafts — which tells the agent the effect window. However, it offers no explicit when-to-use vs. alternatives guidance (e.g., relative to draft_page or redraft_page_section), leaving routing to inference.

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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