carousels_apply_templateReplace one carousel slide with a saved private template.
| Name | Required | Description | Default |
|---|---|---|---|
| projectId | Yes | UUID string. | |
| slideIndex | Yes | ||
| workspaceId | No | ||
| idempotencyKey | Yes | ||
| savedTemplateId | Yes |
| Name | Required | Description | Default |
|---|---|---|---|
| kit | No | ||
| name | No | ||
| frame | No | ||
| style | No | ||
| locale | No | ||
| slides | No | ||
| can_undo | No | ||
| platform | No | ||
| revision | No | ||
| warnings | No | ||
| templates | No | ||
| font_faces | No | ||
| project_id | No | ||
| next_actions | No | ||
| mutationReceipt | No |
Changes observed during successful MCP inspections.
Output schema / properties / font_facesAdded value: +{
+ "items": {
+ "additionalProperties": false,
+ "properties": {
+ "family": {
+ "maxLength": 160,
+ "minLength": 1,
+ "type": "string"
+ },
+ "src": {
+ "maxLength": 4000,
+ "minLength": 1,
+ "type": "string"
+ },
+ "style": {
+ "enum": [
+ "normal",
+ "italic",
+ "oblique"
+ ],
+ "type": "string"
+ },
+ "unicodeRange": {
+ "maxLength": 8000,
+ "type": "string"
+ },
+ "weight": {
+ "maxLength": 32,
+ "minLength": 1,
+ "type": "string"
+ }
+ },
+ "required": [
+ "family",
+ "src",
+ "weight",
+ "style",
+ "unicodeRange"
+ ],
+ "type": "object"
+ },
+ "maxItems": 256,
+ "type": "array"
+}Output schema / properties / slides / items / properties / visual / properties / creative_artifact_idAdded value: +{
+ "format": "uuid",
+ "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+ "type": "string"
+}Output schema / properties / slides / items / properties / visual / properties / creative_sourceAdded value: +{
+ "additionalProperties": false,
+ "properties": {
+ "artifact_id": {
+ "format": "uuid",
+ "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+ "type": "string"
+ },
+ "composition_id": {
+ "minLength": 1,
+ "type": "string"
+ },
+ "controls": {
+ "anyOf": [
+ {
+ "additionalProperties": false,
+ "properties": {
+ "fields": {
+ "items": {
+ "oneOf": [
+ {
+ "additionalProperties": false,
+ "properties": {
+ "key": {
+ "maxLength": 80,
+ "minLength": 1,
+ "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+ "type": "string"
+ },
+ "label": {
+ "maxLength": 120,
+ "minLength": 1,
+ "type": "string"
+ },
+ "maxLength": {
+ "maximum": 10000,
+ "minimum": 1,
+ "type": "integer"
+ },
+ "type": {
+ "const": "text",
+ "type": "string"
+ }
+ },
+ "required": [
+ "key",
+ "label",
+ "type",
+ "maxLength"
+ ],
+ "type": "object"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "key": {
+ "maxLength": 80,
+ "minLength": 1,
+ "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+ "type": "string"
+ },
+ "label": {
+ "maxLength": 120,
+ "minLength": 1,
+ "type": "string"
+ },
+ "type": {
+ "const": "color",
+ "type": "string"
+ }
+ },
+ "required": [
+ "key",
+ "label",
+ "type"
+ ],
+ "type": "object"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "key": {
+ "maxLength": 80,
+ "minLength": 1,
+ "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+ "type": "string"
+ },
+ "label": {
+ "maxLength": 120,
+ "minLength": 1,
+ "type": "string"
+ },
+ "type": {
+ "const": "media",
+ "type": "string"
+ }
+ },
+ "required": [
+ "key",
+ "label",
+ "type"
+ ],
+ "type": "object"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "key": {
+ "maxLength": 80,
+ "minLength": 1,
+ "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+ "type": "string"
+ },
+ "label": {
+ "maxLength": 120,
+ "minLength": 1,
+ "type": "string"
+ },
+ "max": {
+ "maximum": 10800,
+ "type": "number"
+ },
+ "min": {
+ "minimum": 0,
+ "type": "number"
+ },
+ "step": {
+ "exclusiveMinimum": 0,
+ "type": "number"
+ },
+ "type": {
+ "const": "timing",
+ "type": "string"
+ }
+ },
+ "required": [
+ "key",
+ "label",
+ "type",
+ "min",
+ "max",
+ "step"
+ ],
+ "type": "object"
+ }
+ ]
+ },
+ "maxItems": 40,
+ "minItems": 1,
+ "type": "array"
+ },
+ "file": {
+ "format": "ends_with",
+ "maxLength": 180,
+ "minLength": 1,
+ "pattern": ".*\\.json$",
+ "type": "string"
+ }
+ },
+ "required": [
+ "file",
+ "fields"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "fps": {
+ "exclusiveMinimum": 0,
+ "type": "number"
+ },
+ "frame": {
+ "maximum": 9007199254740991,
+ "minimum": 0,
+ "type": "integer"
+ },
+ "frame_hash": {
+ "pattern": "^[a-f0-9]{64}$",
+ "type": "string"
+ },
+ "height": {
+ "exclusiveMinimum": 0,
+ "maximum": 9007199254740991,
+ "type": "integer"
+ },
+ "media_asset_id": {
+ "format": "uuid",
+ "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+ "type": "string"
+ },
+ "project_id": {
+ "format": "uuid",
+ "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+ "type": "string"
+ },
+ "runtime_identity": {
+ "minLength": 1,
+ "type": "string"
+ },
+ "source_hash": {
+ "pattern": "^[a-f0-9]{64}$",
+ "type": "string"
+ },
+ "source_revision": {
+ "exclusiveMinimum": 0,
+ "maximum": 9007199254740991,
+ "type": "integer"
+ },
+ "source_revision_id": {
+ "format": "uuid",
+ "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
+ "type": "string"
+ },
+ "values": {
+ "additionalProperties": {
+ "anyOf": [
+ {
+ "maxLength": 10000,
+ "type": "string"
+ },
+ {
+ "type": "number"
+ }
+ ]
+ },
+ "propertyNames": {
+ "maxLength": 80,
+ "minLength": 1,
+ "pattern": "^[A-Za-z][A-Za-z0-9_]*$",
+ "type": "string"
+ },
+ "type": "object"
+ },
+ "width": {
+ "exclusiveMinimum": 0,
+ "maximum": 9007199254740991,
+ "type": "integer"
+ }
+ },
+ "required": [
+ "artifact_id",
+ "project_id",
+ "source_revision_id",
+ "source_revision",
+ "source_hash",
+ "runtime_identity",
+ "composition_id",
+ "frame",
+ "width",
+ "height",
+ "fps",
+ "frame_hash",
+ "media_asset_id",
+ "controls",
+ "values"
+ ],
+ "type": "object"
+}Output schema / properties / slides / items / properties / visual / properties / cropAdded value: +{
+ "additionalProperties": false,
+ "properties": {
+ "height": {
+ "exclusiveMinimum": 0,
+ "maximum": 1,
+ "type": "number"
+ },
+ "left": {
+ "maximum": 1,
+ "minimum": 0,
+ "type": "number"
+ },
+ "top": {
+ "maximum": 1,
+ "minimum": 0,
+ "type": "number"
+ },
+ "width": {
+ "exclusiveMinimum": 0,
+ "maximum": 1,
+ "type": "number"
+ }
+ },
+ "required": [
+ "left",
+ "top",
+ "width",
+ "height"
+ ],
+ "type": "object"
+}Output schema / properties / slides / items / properties / visual / properties / kind / enumPrevious value: -[
- "media_asset",
- "generate",
- "solid",
- "gradient",
- "html",
- "template"
-]New value: +[
+ "creative_source",
+ "media_asset",
+ "generate",
+ "solid",
+ "gradient",
+ "html",
+ "template"
+]Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is known. The description's use of 'Replace' aligns with the destructive hint and adds that the source must be a saved private template, but it says nothing about authorization needs, what happens to the overwritten slide content, or the destructive scope. With annotations covering safety, a 3 is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no wasted words. It is tight, though its brevity is partly what leaves the usage and parameter gaps unfilled.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The output schema removes the need to describe return values, but for a destructive five-parameter mutation the description is too thin: no usage context against numerous siblings, no preconditions, and minimal parameter clarification on top of 20% schema coverage.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is only 20% (just projectId as 'UUID string.'). The description only loosely maps to savedTemplateId ('saved private template') and slideIndex ('one carousel slide'); it says nothing about idempotencyKey, workspaceId, or the 0–34 slideIndex range. For a 5-param tool at low coverage, the description does not compensate for the gap.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states a specific verb (replace), resource (one carousel slide), and source (a saved private template), so the operation is clear. It does not, however, distinguish itself from overlapping siblings such as carousels_apply_theme, carousels_apply_brand, or carousels_patch_slide, all of which also mutate a carousel slide.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no guidance on when to use this tool versus the dense set of carousel siblings (apply_theme, apply_brand, patch_slide, save_template). No prerequisites, no exclusions, and no indication of when a saved-template replacement is preferable to a theme or brand apply.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.