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hermoso-ai

Hermoso

Official

Create a Pin

post_to_pinterest
Destructive

Publish a Pinterest Pin from any finished image, video, or carousel to a chosen board, including title, description, and destination link.

Instructions

Create a Pin on one of the user’s Pinterest boards from any finished visual they have — image, video, or a 2–5 slide CAROUSEL (pass the slides in order as imageUrls[] and Pinterest publishes one swipeable Pin). Title, description and destination link ride along. The link is what makes a Pin drive traffic, so ask for it rather than omitting it, and the description is the text Pinterest search actually reads. boardId is REQUIRED: call list_pinterest_boards first and let the user choose. This PUBLISHES to their public profile — confirm the board, title and link before calling. Video Pins take a minute or two while Pinterest ingests the file. Needs Pinterest connected (Settings > Connectors > Pinterest).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
hookNoWHAT ANGLE this post is built on, recorded only at publish time. post_performance ranks hooks on it (a winner needs 5 posts sharing ONE hook), so pass a list_hooks id (e.g. "direct_callout", "before_after") or reuse your own wording EXACTLY across a campaign. Omit it and this post never votes on which hook works.
linkNodestination URL the Pin clicks through to
brandNoWHICH PROFILE this post belongs to — id or exact name from list_brands (a shared workspace: its profile id). Beats the connection's pin for THIS CALL ONLY; a name that matches no profile, or two, is REFUSED and nothing is posted.
titleNoPin title, max 100 characters
ideaIdNoshort id of the content-plan idea this post came from
recipeNothe post's FORMAT id, e.g. "slideshow" or "imessage_chat" — post_performance groups by it, so reuse one id per format
accountNoWHICH connected account of this channel to post as — its @handle or id from list_connector_accounts. Needed only when the profile has more than one pinterest account connected (several and none named is refused by name, never guessed); omit when there is one.
altTextNoaccessibility alt text, max 500 characters. PIN-LEVEL: Pinterest’s API has no per-item alt text at all, so on a CAROUSEL the FIRST description is used for the whole Pin and the reply states that the others were not sent.
boardIdYesnumeric board id from list_pinterest_boards — the user picks it, never guess
subjectNoWHAT THIS POST IS ABOUT — product, feature, offer or theme (e.g. "winter coat", "free trial"). post_performance's second grouping axis: reuse the exact wording, as with hook.
imageUrlNoa Hermoso render image URL (or an upload_file url)
videoUrlNoa Hermoso render video URL — takes 1–2 minutes to ingest
coverAtMsNoTHE VIDEO COVER of a video Pin, as ONE frame: milliseconds from the start (7000 = the frame at 7s). That frame is cut and sent as the Pin cover image. coverImageUrl wins.
imageUrlsNoCAROUSEL — an ORDERED list of image (and, where the channel allows, video) URLs published as ONE post the viewer swipes through. THIS IS NOT “post several” — it is a single post with several slides, which is what a multi-slide creative (a listicle, a “1/6 · SWIPE” deck) actually needs; publishing only its first slide tells the viewer to swipe at something that cannot. The ORDER is the product. Limits per channel: Instagram 2–10 (images, videos or a mix), Threads 2–20 (mix allowed), Facebook 2+ (Meta publishes no documented maximum; Hermoso caps the upload fan-out at 30 and says so), LinkedIn company Pages 2–20 (images only), Pinterest 2–5 (images only), TikTok up to 35. One url here is simply an ordinary single post. Anything a channel cannot do is REFUSED with the real reason — nothing is ever quietly downgraded to one slide.
slideTextNoPINTEREST CAROUSEL ONLY — per-slide title, description and destination LINK, one object per slide in slide order. This is the ONLY genuine per-slide caption on any channel Hermoso publishes to: slide 4 can send people to the product ON slide 4, where every other platform gives a carousel one shared caption. Omit any field to leave it unset; the Pin’s own title/description/link still describe the Pin as a whole. Pinterest publishes no length limit on these, so nothing is truncated. More entries than slides is refused rather than dropped.
descriptionNoPin description, max 800 characters — this is what Pinterest search reads
coverImageUrlNovideo Pins only — a render to use as the cover frame
platformCoverNoVIDEO COVER. Omit it (the default) and Hermoso sets the video’s best frame — the same frame as its Library thumbnail — as the cover (on Pinterest the frame rides as the cover image). true = send no cover and let the platform pick (usually the first frame). A cover you pass yourself always wins.
allowDuplicateNopost it even though an identical post was just made or attempted. Only pass this when the user genuinely wants the same thing posted twice, or when you have LOOKED at the account and confirmed a timed-out attempt did not land.
boardSectionIdNooptional section within the board
idempotencyKeyNoSAFE RETRIES — any stable string: a repeat of the SAME publish within 24h returns the ORIGINAL post id instead of posting again (an identical publish is also auto-recognised for 10 minutes). On a timeout or an ambiguous error, CALL AGAIN WITH THE SAME KEY: it reports the original post or publishes it once. It never posts twice.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv0.1.374
    • changedInput schema / properties / account / description
      Previous value: -"WHICH connected account of this channel to post as — its @handle or id from list_connector_accounts. Needed only when the brand has more than one pinterest account connected (several and none named is refused by name, never guessed); omit when there is one."New value: +"WHICH connected account of this channel to post as — its @handle or id from list_connector_accounts. Needed only when the profile has more than one pinterest account connected (several and none named is refused by name, never guessed); omit when there is one."
    • changedInput schema / properties / brand / description
      Previous value: -"WHICH BRAND this post belongs to — id or exact name from list_brands (a shared workspace: its profile id). Beats the connection's pin for THIS CALL ONLY; a name that matches no brand, or two, is REFUSED and nothing is posted."New value: +"WHICH PROFILE this post belongs to — id or exact name from list_brands (a shared workspace: its profile id). Beats the connection's pin for THIS CALL ONLY; a name that matches no profile, or two, is REFUSED and nothing is posted."
  2. Changed5 schema fields changedv0.1.320
    • changedInput schema / properties / brand / description
      Previous value: -"WHICH BRAND this post belongs to — the id or exact name from list_brands (a workspace shared with you: its profile id). Use it whenever the account has more than one brand and you are not certain which one this connection is pinned to: it beats the pin for THIS CALL ONLY and changes nothing about the connection. A name that matches no brand, or two brands, is REFUSED and nothing is posted — never resolved to the pin, which is the account you were guarding against."New value: +"WHICH BRAND this post belongs to — id or exact name from list_brands (a shared workspace: its profile id). Beats the connection's pin for THIS CALL ONLY; a name that matches no brand, or two, is REFUSED and nothing is posted."
    • addedInput schema / properties / coverAtMs
      Added value: +{
      +  "description": "THE VIDEO COVER of a video Pin, as ONE frame: milliseconds from the start (7000 = the frame at 7s). That frame is cut and sent as the Pin cover image. coverImageUrl wins.",
      +  "type": "number"
      +}
    • changedInput schema / properties / hook / description
      Previous value: -"WHAT ANGLE THIS POST IS BUILT ON — the single most valuable field here, and the only moment it can ever be recorded. post_performance groups on it to answer \"which hooks work\", and it needs 5 posts sharing ONE hook before it will call anything a winner, so REUSE THE SAME WORDING across a campaign instead of rephrasing it every time. Best of all, pass a hook id from list_hooks (e.g. \"direct_callout\", \"mid_problem\", \"before_after\") — those fold onto a stable key however they are spelled, so a whole brand accumulates evidence on one row. Your own wording is fine too; it just only groups when you repeat it exactly. Omitting it means this post can never vote on which hook works."New value: +"WHAT ANGLE this post is built on, recorded only at publish time. post_performance ranks hooks on it (a winner needs 5 posts sharing ONE hook), so pass a list_hooks id (e.g. \"direct_callout\", \"before_after\") or reuse your own wording EXACTLY across a campaign. Omit it and this post never votes on which hook works."
    • changedInput schema / properties / idempotencyKey / description
      Previous value: -"SAFE RETRIES. Publishing can take minutes (a video upload, a carousel of ten slides) and a transport can time out while the post SUCCEEDS — retrying blind is how the same thing gets posted twice. Pass any stable string here and a repeat of the SAME publish returns the ORIGINAL post id instead of posting again (24h). You do not have to: an identical publish is auto-recognised for 10 minutes anyway. If a call times out or errors ambiguously, CALL AGAIN WITH THE SAME KEY — that is the safe move, and it will either report the original post or publish it for the first time. It never posts twice."New value: +"SAFE RETRIES — any stable string: a repeat of the SAME publish within 24h returns the ORIGINAL post id instead of posting again (an identical publish is also auto-recognised for 10 minutes). On a timeout or an ambiguous error, CALL AGAIN WITH THE SAME KEY: it reports the original post or publishes it once. It never posts twice."
    • changedInput schema / properties / subject / description
      Previous value: -"WHAT THIS POST IS ABOUT — the product, feature, offer or theme (e.g. \"winter coat\", \"free trial\", \"founder story\"). The second grouping axis in post_performance. Same rule as hook: reuse the exact wording so posts about one subject land in one group."New value: +"WHAT THIS POST IS ABOUT — product, feature, offer or theme (e.g. \"winter coat\", \"free trial\"). post_performance's second grouping axis: reuse the exact wording, as with hook."
  3. Changed2 schema fields changedv0.1.281
    • addedInput schema / properties / ideaId
      Added value: +{
      +  "description": "short id of the content-plan idea this post came from",
      +  "type": "string"
      +}
    • addedInput schema / properties / recipe
      Added value: +{
      +  "description": "the post's FORMAT id, e.g. \"slideshow\" or \"imessage_chat\" — post_performance groups by it, so reuse one id per format",
      +  "type": "string"
      +}
  4. Changed1 schema field changedv0.1.272
    • changedInput schema / properties / platformCover / description
      Previous value: -"VIDEO COVER. Omit it (the default) and Hermoso sets the video’s best frame — the same frame as its Library thumbnail — as the cover (Pinterest’s cover key frame, to the whole second). true = send no cover and let the platform pick (usually the first frame). A cover you pass yourself always wins."New value: +"VIDEO COVER. Omit it (the default) and Hermoso sets the video’s best frame — the same frame as its Library thumbnail — as the cover (on Pinterest the frame rides as the cover image). true = send no cover and let the platform pick (usually the first frame). A cover you pass yourself always wins."
  5. Changed1 schema field changedv0.1.256
    • addedInput schema / properties / platformCover
      Added value: +{
      +  "description": "VIDEO COVER. Omit it (the default) and Hermoso sets the video’s best frame — the same frame as its Library thumbnail — as the cover (Pinterest’s cover key frame, to the whole second). true = send no cover and let the platform pick (usually the first frame). A cover you pass yourself always wins.",
      +  "type": "boolean"
      +}
  6. Changed1 schema field changedv0.1.251
    • addedInput schema / properties / brand
      Added value: +{
      +  "description": "WHICH BRAND this post belongs to — the id or exact name from list_brands (a workspace shared with you: its profile id). Use it whenever the account has more than one brand and you are not certain which one this connection is pinned to: it beats the pin for THIS CALL ONLY and changes nothing about the connection. A name that matches no brand, or two brands, is REFUSED and nothing is posted — never resolved to the pin, which is the account you were guarding against.",
      +  "type": "string"
      +}
  7. Changed1 schema field changedv0.1.189
    • addedInput schema / properties / account
      Added value: +{
      +  "description": "WHICH connected account of this channel to post as — its @handle or id from list_connector_accounts. Needed only when the brand has more than one pinterest account connected (several and none named is refused by name, never guessed); omit when there is one.",
      +  "type": "string"
      +}
  8. Addedv0.1.161

TDQS

A4.8/5.0
Behavior5/5

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

Annotations already declare destructive=true and openWorld=true, but the description adds real context beyond them: this PUBLISHES to the user's public profile, video Pins take 1–2 minutes to ingest, Pinterest must be connected, and a carousel is one swipeable Pin rather than several posts (with the API's pin-level alt-text limitation disclosed).

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 core action and the carousel distinction, and every sentence carries operational information. It is dense and runs long as a single block, but nothing is pure filler.

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 a 21-parameter mutation tool with no output schema, the description covers the critical decision points an agent needs: required boardId and its lookup, public-profile consequences, confirmation protocol, video latency, connector requirement, and idempotency-key retry behavior.

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 100%, so baseline is 3, but the description adds genuine framing beyond the schema: it explains imageUrls[] ordering as the product for carousels, elevates boardId to a required user-chosen value, and stresses that link and description are the traffic- and search-bearing fields.

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?

States a specific verb+resource (create a Pin on one of the user's Pinterest boards) and immediately differentiates scope by content type (image, video, or 2–5 slide carousel), which cleanly separates it from the many sibling post_to_* tools.

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

Usage Guidelines5/5

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

Explicit when-and-how: boardId is REQUIRED and the agent must call list_pinterest_boards first and let the user choose; it tells the agent to ask for the link rather than omit it, and to confirm board/title/link before publishing. It also names the connector prerequisite and the account/brand resolution path via siblings.

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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