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Schedule note

schedule_note

Schedule a note to any combination of Substack, LinkedIn, X, Bluesky, Threads, Instagram, Facebook, TikTok, and Pinterest; Instagram, TikTok, and Pinterest require an image or video. A plain Substack Note with a missing publication is saved locally. Share its draftUrl and connectionUrl so the writer can schedule it from Drafts. Character limits: Bluesky 300, Threads 500, LinkedIn 3000, X 25000 (posted as a thread). Substack shows each line of a Note as its own paragraph, so keep lines that belong together on one line. Explicit platformVersions must fit their limits; otherwise overlong platform text is shortened at a sentence boundary, with adjustedPlatforms and warnings returned. When a writer has several connected accounts on Threads, Facebook, TikTok, Pinterest or X, the Note goes to the default account unless socialAccountIds names one from list_social_accounts; with several and no default the request is refused until one is named. Authorized team routing uses workspace and writer. Substack Notes publish from the verified connected profile, not a publication page. Safe to retry: pass a new clientRequestId for each note and reuse it when retrying that note, and a repeat returns the original result instead of scheduling again. Even without one, a note with the same text, platform and time as one scheduled in the last 24 hours is not copied: the result has duplicate: true and the existing schedule ids. To quote a Substack Note or post (like "Restack with a note"), pass its link as quoteUrl rather than in content. To schedule several notes, prefer schedule_notes. To send a Note that is already scheduled to another platform or account, use add_platform_to_scheduled_note instead: scheduling it again creates a separate Note. connectionWarnings with action RESYNC_SUBSTACK_SESSION means the Note is scheduled but will not publish until the writer resyncs Substack in Narrareach; tell the writer.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "scheduledFor": "<scheduledFor>",
      "platforms": "<platforms>"
    },
    "name": "schedule_note"
  }
}

Input Schema

NameRequiredDescriptionDefault
mediaNoOptional media objects supporting image or video bytes as data URIs or base64, or public HTTPS URLs. In ChatGPT, for a file the user attached in the chat, first call upload_media with it in file, then pass the returned publicUrl here as url.
titleNoUsed only when creating a new note draft.
writerNoAuthorized team writer name, handle, or id. "me" selects the linked team voice. Required when a team workspace has multiple writers.
contentNoUsed only when creating a new note draft.
draftIdNoOptional existing note draft id to schedule as-is.
quoteUrlNoOptional public Substack Note link (https://substack.com/@writer/note/c-123) or Substack post/article link (https://publication.substack.com/p/slug, or the publication's custom domain) to quote. Substack shows it as a quoted card under the note, like "Restack with a note". Do not also put the link in content; if it is there it is taken out. Requires SUBSTACK in platforms; every other platform gets the link at the end of its text instead. Cannot be combined with draftId. Nothing is scheduled when the Note or post cannot be found or is not public. Use preview_note_quote to check a link first.
timezoneNoIANA timezone the scheduledFor time above is expressed in (e.g. "Europe/London"). Defaults to the writer's saved timezone, else UTC.
imageUrlsNoOptional image URLs or image data URIs to attach to the scheduled note.
platformsYes
videoUrlsNoOptional video URLs or video data URIs to attach to the scheduled note.
workspaceNoAuthorized team workspace name or id for team scheduling. Absence selects the authenticated user’s personal account.
firstReplyNoOptional first reply for supported destinations. An invalid reply is omitted per platform without cancelling the root post.
publicationNoSubstack publication name, handle, or URL selected by the user. Optional when exactly one active Substack publication is connected: Narrareach uses it when its session is ready and says which one was used in substackPublicationSelection.message (source "sole_connection"); if the session needs a sync or the profile cannot be verified, nothing is scheduled and the result says what to fix. In a team workspace with one publication, or when a writer who is also a team member omits workspace, nothing is scheduled until the writer confirms it (requiresPublicationChoice: true, publicationChoiceReason: "confirmation_required"). Notes publish from the profile signed in to that connection, including publications sharing one login. Unverified or mismatched profile identity returns action_required without publishing. Notes are profile-level: when it is missing and all of the writer’s publications are signed in to one Substack profile, no choice is needed and the note posts from that profile. Only when the publications span two or more Substack profiles does the writer choose a profile: Narrareach uses the one they chose most recently (and says so in substackPublicationSelection.message), or, with no previous choice, nothing is scheduled and the result has requiresPublicationChoice: true, choiceScope: "profile" and publicationChoices (one per profile); ask the user, then call again with substackConnectionId set to the chosen publicationChoices[].substackConnectionId. An ambiguous publication value also returns publicationChoices.
generationIdNoOptional. Pass the generationId from create_generated_notes when scheduling a generated note: the requestId that create_generated_notes returned. Used only to measure how generated notes are used; it does not change what is scheduled.
scheduledForYesLocal wall-clock publishing date/time interpreted in timezone, including DST (e.g. "2026-07-01T14:30:00" means 2:30 PM). A Z or explicit UTC offset represents an absolute instant instead.
shortVersionNoOne short text for several platforms, e.g. { "text": "...", "platforms": ["X", "BLUESKY", "THREADS"] }, while the other platforms post content as written. Saved as one shared short version the writer edits once in the app. It must fit the tightest platform it goes to (X 280 as one post, Bluesky 300, Threads 500, LinkedIn 3000) or nothing is scheduled. A platform in it cannot also be in platformVersions.
clientRequestIdNoOptional but recommended: your own id for this note, 8 to 80 letters, numbers, hyphens or underscores. Use a new one for each note and the same one when retrying it (for example after a timeout or a rate-limit pause): the retry returns the original result and schedules nothing again. Reusing it with different text, platforms or time is refused.
threadsTopicTagNoOptional Threads topic tag. Threads must be selected; maximum 50 characters.
platformVersionsNoOptional platform-specific text keyed by platform, e.g. { "BLUESKY": "..." }. Each supplied version must fit its limit (Bluesky 300, Threads 500, LinkedIn 3000, X 25000) or nothing is scheduled. Saved as the draft’s platform-specific version.
socialAccountIdsNoOptional account to post to on Threads, Facebook, TikTok, Pinterest or X, keyed by platform, e.g. { "THREADS": "<accountId>" }, with accountId values from list_social_accounts. Omit a platform to use its only account or its default. Required for a platform where list_social_accounts reports accountChoiceRequired; ask the writer which account rather than picking one.
linkedInAccountIdNoOptional LinkedIn account id for a connected LinkedIn destination. Absence of both this field and linkedInOrganizationUrn selects the configured default.
substackConnectionIdNoExact Substack connection identifier, retained for backward compatibility, for example publicationChoices[].substackConnectionId from a requiresPublicationChoice result. publication is the preferred public destination selector; when both are given they must name the same publication.
instagramDestinationsNoInstagram destinations with accountId returned by list_instagram_destinations and optional independent caption. Each account receives its own delivery receipt.
linkedInOrganizationUrnNoOptional LinkedIn Company Page URN for a connected LinkedIn destination. Requires linkedInAccountId.
confirmProfileDestinationNoDeprecated compatibility field. It is ignored and does not override Substack profile routing safety.

Output Schema

NameRequiredDescriptionDefault
codeNo
countNo
notesNo
quoteNo
statusNo
contextNo
messageNo
draftUrlNo
nextStepNo
replayedNo
warningsNo
duplicateNo
firstReplyNo
choiceScopeNo
sideEffectsNo
createdDraftNo
actionMessageNo
connectionUrlNo
supersededIdsNo
preservedDraftNo
clientRequestIdNo
threadsTopicTagNo
connectedAccountNo
adjustedPlatformsNo
preservedScheduleNo
confirmationPromptNo
connectionWarningsNo
duplicatePlatformsNo
publicationChoicesNo
existingScheduleIdsNo
linkedinDestinationNo
proposedDestinationNo
substackPublicationNo
requestedPublicationNo
requiresConfirmationNo
publicationChoiceReasonNo
substackNoteDestinationNo
requiresPublicationChoiceNo
substackPublicationSelectionNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • addedOutput schema / properties / connectionUrl
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / draftUrl
      Added value: +{
      +  "type": "string"
      +}
  2. Changed4 schema fields changed
    • changedInput schema / properties / timezone / description
      Previous value: -"IANA timezone the scheduledFor time above is expressed in (e.g. \"Europe/London\"). Default UTC."New value: +"IANA timezone the scheduledFor time above is expressed in (e.g. \"Europe/London\"). Defaults to the writer's saved timezone, else UTC."
    • addedOutput schema / properties / notes / items / properties / scheduleAdvisory
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "null"
      +    }
      +  ]
      +}
    • addedOutput schema / properties / notes / items / properties / scheduledForLocal
      Added value: +{
      +  "type": "string"
      +}
    • changedOutput schema / properties / notes / items / required
      Previous value: -[
      -  "id",
      -  "itemUrl",
      -  "type",
      -  "platform",
      -  "status",
      -  "scheduledFor",
      -  "timezone",
      -  "postedAt",
      -  "postUrl",
      -  "externalPostId",
      -  "error",
      -  "failureCode",
      -  "socialAccountId",
      -  "contentType",
      -  "distributionKind",
      -  "restackSourceCommentId",
      -  "quote",
      -  "content",
      -  "draft",
      -  "engagement",
      -  "platformMetrics"
      -]New value: +[
      +  "id",
      +  "itemUrl",
      +  "type",
      +  "platform",
      +  "status",
      +  "scheduledFor",
      +  "timezone",
      +  "scheduledForLocal",
      +  "scheduleAdvisory",
      +  "postedAt",
      +  "postUrl",
      +  "externalPostId",
      +  "error",
      +  "failureCode",
      +  "socialAccountId",
      +  "contentType",
      +  "distributionKind",
      +  "restackSourceCommentId",
      +  "quote",
      +  "content",
      +  "draft",
      +  "engagement",
      +  "platformMetrics"
      +]
  3. Changed1 schema field changed
    • changedOutput schema / properties / linkedinDestination / anyOf
      Previous value: -[
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "accountId": {
      -        "type": "string"
      -      },
      -      "isDefault": {
      -        "type": "boolean"
      -      },
      -      "kind": {
      -        "enum": [
      -          "profile",
      -          "page"
      -        ],
      -        "type": "string"
      -      },
      -      "label": {
      -        "type": "string"
      -      },
      -      "organizationUrn": {
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "accountId",
      -      "label",
      -      "kind",
      -      "isDefault"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "type": "null"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "accountId": {
      +        "type": "string"
      +      },
      +      "aliasAccountIds": {
      +        "items": {
      +          "type": "string"
      +        },
      +        "type": "array"
      +      },
      +      "isDefault": {
      +        "type": "boolean"
      +      },
      +      "kind": {
      +        "enum": [
      +          "profile",
      +          "page"
      +        ],
      +        "type": "string"
      +      },
      +      "label": {
      +        "type": "string"
      +      },
      +      "organizationUrn": {
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "accountId",
      +      "label",
      +      "kind",
      +      "isDefault"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "type": "null"
      +  }
      +]
  4. Changed1 schema field changed
    • addedInput schema / properties / shortVersion
      Added value: +{
      +  "additionalProperties": false,
      +  "description": "One short text for several platforms, e.g. { \"text\": \"...\", \"platforms\": [\"X\", \"BLUESKY\", \"THREADS\"] }, while the other platforms post content as written. Saved as one shared short version the writer edits once in the app. It must fit the tightest platform it goes to (X 280 as one post, Bluesky 300, Threads 500, LinkedIn 3000) or nothing is scheduled. A platform in it cannot also be in platformVersions.",
      +  "properties": {
      +    "platforms": {
      +      "items": {
      +        "enum": [
      +          "X",
      +          "BLUESKY",
      +          "THREADS",
      +          "LINKEDIN"
      +        ],
      +        "type": "string"
      +      },
      +      "minItems": 1,
      +      "type": "array"
      +    },
      +    "text": {
      +      "minLength": 1,
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "text",
      +    "platforms"
      +  ],
      +  "type": "object"
      +}
  5. Changed4 schema fields changed
    • addedInput schema / properties / quoteUrl
      Added value: +{
      +  "description": "Optional public Substack Note link (https://substack.com/@writer/note/c-123) or Substack post/article link (https://publication.substack.com/p/slug, or the publication's custom domain) to quote. Substack shows it as a quoted card under the note, like \"Restack with a note\". Do not also put the link in content; if it is there it is taken out. Requires SUBSTACK in platforms; every other platform gets the link at the end of its text instead. Cannot be combined with draftId. Nothing is scheduled when the Note or post cannot be found or is not public. Use preview_note_quote to check a link first.",
      +  "maxLength": 2048,
      +  "minLength": 1,
      +  "type": "string"
      +}
    • addedOutput schema / properties / notes / items / properties / quote
      Added value: +{
      +  "anyOf": [
      +    {
      +      "additionalProperties": false,
      +      "properties": {
      +        "kind": {
      +          "enum": [
      +            "note",
      +            "post"
      +          ],
      +          "type": "string"
      +        },
      +        "url": {
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "url",
      +        "kind"
      +      ],
      +      "type": "object"
      +    },
      +    {
      +      "type": "null"
      +    }
      +  ]
      +}
    • changedOutput schema / properties / notes / items / required
      Previous value: -[
      -  "id",
      -  "itemUrl",
      -  "type",
      -  "platform",
      -  "status",
      -  "scheduledFor",
      -  "timezone",
      -  "postedAt",
      -  "postUrl",
      -  "externalPostId",
      -  "error",
      -  "failureCode",
      -  "socialAccountId",
      -  "contentType",
      -  "distributionKind",
      -  "restackSourceCommentId",
      -  "content",
      -  "draft",
      -  "engagement",
      -  "platformMetrics"
      -]New value: +[
      +  "id",
      +  "itemUrl",
      +  "type",
      +  "platform",
      +  "status",
      +  "scheduledFor",
      +  "timezone",
      +  "postedAt",
      +  "postUrl",
      +  "externalPostId",
      +  "error",
      +  "failureCode",
      +  "socialAccountId",
      +  "contentType",
      +  "distributionKind",
      +  "restackSourceCommentId",
      +  "quote",
      +  "content",
      +  "draft",
      +  "engagement",
      +  "platformMetrics"
      +]
    • addedOutput schema / properties / quote
      Added value: +{
      +  "anyOf": [
      +    {
      +      "additionalProperties": false,
      +      "properties": {
      +        "kind": {
      +          "enum": [
      +            "note",
      +            "post"
      +          ],
      +          "type": "string"
      +        },
      +        "url": {
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "url",
      +        "kind"
      +      ],
      +      "type": "object"
      +    },
      +    {
      +      "type": "null"
      +    }
      +  ]
      +}
  6. Changed7 schema fields changed
    • addedInput schema / properties / clientRequestId
      Added value: +{
      +  "description": "Optional but recommended: your own id for this note, 8 to 80 letters, numbers, hyphens or underscores. Use a new one for each note and the same one when retrying it (for example after a timeout or a rate-limit pause): the retry returns the original result and schedules nothing again. Reusing it with different text, platforms or time is refused.",
      +  "pattern": "^[A-Za-z0-9_-]{8,80}$",
      +  "type": "string"
      +}
    • addedOutput schema / properties / clientRequestId
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "null"
      +    }
      +  ]
      +}
    • addedOutput schema / properties / duplicate
      Added value: +{
      +  "type": "boolean"
      +}
    • addedOutput schema / properties / duplicatePlatforms
      Added value: +{
      +  "items": {
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
    • addedOutput schema / properties / existingScheduleIds
      Added value: +{
      +  "items": {
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
    • addedOutput schema / properties / replayed
      Added value: +{
      +  "type": "boolean"
      +}
    • addedOutput schema / properties / supersededIds
      Added value: +{
      +  "items": {
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
  7. Changed1 schema field changed
    • addedInput schema / properties / generationId
      Added value: +{
      +  "description": "Optional. Pass the generationId from create_generated_notes when scheduling a generated note: the requestId that create_generated_notes returned. Used only to measure how generated notes are used; it does not change what is scheduled.",
      +  "pattern": "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$",
      +  "type": "string"
      +}
  8. Changed3 schema fields changed
    • changedOutput schema / properties / notes / items / properties / engagement / anyOf
      Previous value: -[
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "clicks": {
      -        "anyOf": [
      -          {
      -            "type": "integer"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ]
      -      },
      -      "comments": {
      -        "type": "integer"
      -      },
      -      "impressions": {
      -        "anyOf": [
      -          {
      -            "type": "integer"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ]
      -      },
      -      "likes": {
      -        "type": "integer"
      -      },
      -      "recordedAt": {
      -        "format": "date-time",
      -        "type": "string"
      -      },
      -      "shares": {
      -        "type": "integer"
      -      }
      -    },
      -    "required": [
      -      "likes",
      -      "comments",
      -      "shares",
      -      "impressions",
      -      "clicks",
      -      "recordedAt"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "type": "null"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "clicks": {
      +        "anyOf": [
      +          {
      +            "type": "integer"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "comments": {
      +        "type": "integer"
      +      },
      +      "follows": {
      +        "anyOf": [
      +          {
      +            "type": "integer"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "freeSubscriptions": {
      +        "anyOf": [
      +          {
      +            "type": "integer"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "impressions": {
      +        "anyOf": [
      +          {
      +            "type": "integer"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "likes": {
      +        "type": "integer"
      +      },
      +      "paidSubscriptions": {
      +        "anyOf": [
      +          {
      +            "type": "integer"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "recordedAt": {
      +        "format": "date-time",
      +        "type": "string"
      +      },
      +      "shares": {
      +        "type": "integer"
      +      }
      +    },
      +    "required": [
      +      "likes",
      +      "comments",
      +      "shares",
      +      "impressions",
      +      "clicks",
      +      "follows",
      +      "freeSubscriptions",
      +      "paidSubscriptions",
      +      "recordedAt"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "type": "null"
      +  }
      +]
    • addedOutput schema / properties / notes / items / properties / platformMetrics
      Added value: +{
      +  "anyOf": [
      +    {
      +      "additionalProperties": false,
      +      "properties": {
      +        "clicks": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "comments": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "follows": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "impressions": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "likes": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "observedAt": {
      +          "format": "date-time",
      +          "type": "string"
      +        },
      +        "reach": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "reposts": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "saves": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "sends": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "shares": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        },
      +        "views": {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ]
      +        }
      +      },
      +      "required": [
      +        "likes",
      +        "comments",
      +        "shares",
      +        "saves",
      +        "sends",
      +        "clicks",
      +        "views",
      +        "reach",
      +        "impressions",
      +        "follows",
      +        "reposts",
      +        "observedAt"
      +      ],
      +      "type": "object"
      +    },
      +    {
      +      "type": "null"
      +    }
      +  ]
      +}
    • changedOutput schema / properties / notes / items / required
      Previous value: -[
      -  "id",
      -  "itemUrl",
      -  "type",
      -  "platform",
      -  "status",
      -  "scheduledFor",
      -  "timezone",
      -  "postedAt",
      -  "postUrl",
      -  "externalPostId",
      -  "error",
      -  "failureCode",
      -  "socialAccountId",
      -  "contentType",
      -  "distributionKind",
      -  "restackSourceCommentId",
      -  "content",
      -  "draft",
      -  "engagement"
      -]New value: +[
      +  "id",
      +  "itemUrl",
      +  "type",
      +  "platform",
      +  "status",
      +  "scheduledFor",
      +  "timezone",
      +  "postedAt",
      +  "postUrl",
      +  "externalPostId",
      +  "error",
      +  "failureCode",
      +  "socialAccountId",
      +  "contentType",
      +  "distributionKind",
      +  "restackSourceCommentId",
      +  "content",
      +  "draft",
      +  "engagement",
      +  "platformMetrics"
      +]
  9. Changed1 schema field changed
    • changedOutput schema / properties / notes / items / properties / engagement / anyOf
      Previous value: -[
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "clicks": {
      -        "type": "integer"
      -      },
      -      "comments": {
      -        "type": "integer"
      -      },
      -      "impressions": {
      -        "type": "integer"
      -      },
      -      "likes": {
      -        "type": "integer"
      -      },
      -      "recordedAt": {
      -        "format": "date-time",
      -        "type": "string"
      -      },
      -      "shares": {
      -        "type": "integer"
      -      }
      -    },
      -    "required": [
      -      "likes",
      -      "comments",
      -      "shares",
      -      "impressions",
      -      "clicks",
      -      "recordedAt"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "type": "null"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "clicks": {
      +        "anyOf": [
      +          {
      +            "type": "integer"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "comments": {
      +        "type": "integer"
      +      },
      +      "impressions": {
      +        "anyOf": [
      +          {
      +            "type": "integer"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "likes": {
      +        "type": "integer"
      +      },
      +      "recordedAt": {
      +        "format": "date-time",
      +        "type": "string"
      +      },
      +      "shares": {
      +        "type": "integer"
      +      }
      +    },
      +    "required": [
      +      "likes",
      +      "comments",
      +      "shares",
      +      "impressions",
      +      "clicks",
      +      "recordedAt"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "type": "null"
      +  }
      +]
  10. Changed3 schema fields changed
    • addedOutput schema / properties / notes / items / properties / failureCode
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "null"
      +    }
      +  ]
      +}
    • addedOutput schema / properties / notes / items / properties / socialAccountId
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "null"
      +    }
      +  ]
      +}
    • changedOutput schema / properties / notes / items / required
      Previous value: -[
      -  "id",
      -  "itemUrl",
      -  "type",
      -  "platform",
      -  "status",
      -  "scheduledFor",
      -  "timezone",
      -  "postedAt",
      -  "postUrl",
      -  "externalPostId",
      -  "error",
      -  "contentType",
      -  "distributionKind",
      -  "restackSourceCommentId",
      -  "content",
      -  "draft",
      -  "engagement"
      -]New value: +[
      +  "id",
      +  "itemUrl",
      +  "type",
      +  "platform",
      +  "status",
      +  "scheduledFor",
      +  "timezone",
      +  "postedAt",
      +  "postUrl",
      +  "externalPostId",
      +  "error",
      +  "failureCode",
      +  "socialAccountId",
      +  "contentType",
      +  "distributionKind",
      +  "restackSourceCommentId",
      +  "content",
      +  "draft",
      +  "engagement"
      +]
  11. Changed1 schema field changed
    • addedInput schema / properties / socialAccountIds
      Added value: +{
      +  "additionalProperties": {
      +    "minLength": 1,
      +    "type": "string"
      +  },
      +  "description": "Optional account to post to on Threads, Facebook, TikTok, Pinterest or X, keyed by platform, e.g. { \"THREADS\": \"<accountId>\" }, with accountId values from list_social_accounts. Omit a platform to use its only account or its default. Required for a platform where list_social_accounts reports accountChoiceRequired; ask the writer which account rather than picking one.",
      +  "type": "object"
      +}
  12. Changed1 schema field changed
    • changedInput schema / properties / instagramDestinations / description
      Previous value: -"Instagram destinations with accountId from connected accounts and optional independent caption. Each account receives its own delivery receipt."New value: +"Instagram destinations with accountId returned by list_instagram_destinations and optional independent caption. Each account receives its own delivery receipt."
  13. Changed4 schema fields changed
    • changedInput schema / properties / publication / description
      Previous value: -"Required when platforms includes Substack: publication name, handle, or URL selected by the user. Notes publish from the profile signed in to that connection, including publications sharing one login. Unverified or mismatched profile identity returns action_required without publishing. Notes are profile-level: when it is missing and all of the writer’s publications are signed in to one Substack profile, no choice is needed and the note posts from that profile. Only when the publications span two or more Substack profiles does the writer choose a profile: Narrareach uses the one they chose most recently (and says so in substackPublicationSelection.message), or, with no previous choice, nothing is scheduled and the result has requiresPublicationChoice: true, choiceScope: \"profile\" and publicationChoices (one per profile); ask the user, then call again with substackConnectionId set to the chosen publicationChoices[].substackConnectionId. An ambiguous publication value also returns publicationChoices."New value: +"Substack publication name, handle, or URL selected by the user. Optional when exactly one active Substack publication is connected: Narrareach uses it when its session is ready and says which one was used in substackPublicationSelection.message (source \"sole_connection\"); if the session needs a sync or the profile cannot be verified, nothing is scheduled and the result says what to fix. In a team workspace with one publication, or when a writer who is also a team member omits workspace, nothing is scheduled until the writer confirms it (requiresPublicationChoice: true, publicationChoiceReason: \"confirmation_required\"). Notes publish from the profile signed in to that connection, including publications sharing one login. Unverified or mismatched profile identity returns action_required without publishing. Notes are profile-level: when it is missing and all of the writer’s publications are signed in to one Substack profile, no choice is needed and the note posts from that profile. Only when the publications span two or more Substack profiles does the writer choose a profile: Narrareach uses the one they chose most recently (and says so in substackPublicationSelection.message), or, with no previous choice, nothing is scheduled and the result has requiresPublicationChoice: true, choiceScope: \"profile\" and publicationChoices (one per profile); ask the user, then call again with substackConnectionId set to the chosen publicationChoices[].substackConnectionId. An ambiguous publication value also returns publicationChoices."
    • changedOutput schema / properties / publicationChoiceReason / enum
      Previous value: -[
      -  "not_specified",
      -  "ambiguous",
      -  "identity_unconfirmed"
      -]New value: +[
      +  "not_specified",
      +  "ambiguous",
      +  "identity_unconfirmed",
      +  "confirmation_required"
      +]
    • removedOutput schema / properties / substackPublicationSelection / properties / source / const
      Removed value: -"remembered_choice"
    • addedOutput schema / properties / substackPublicationSelection / properties / source / enum
      Added value: +[
      +  "remembered_choice",
      +  "sole_connection"
      +]
  14. Changed8 schema fields changed
    • changedInput schema / properties / publication / description
      Previous value: -"Required when platforms includes Substack: publication name, handle, or URL selected by the user. Notes publish from the profile signed in to that connection, including publications sharing one login. Unverified or mismatched profile identity returns action_required without publishing."New value: +"Required when platforms includes Substack: publication name, handle, or URL selected by the user. Notes publish from the profile signed in to that connection, including publications sharing one login. Unverified or mismatched profile identity returns action_required without publishing. Notes are profile-level: when it is missing and all of the writer’s publications are signed in to one Substack profile, no choice is needed and the note posts from that profile. Only when the publications span two or more Substack profiles does the writer choose a profile: Narrareach uses the one they chose most recently (and says so in substackPublicationSelection.message), or, with no previous choice, nothing is scheduled and the result has requiresPublicationChoice: true, choiceScope: \"profile\" and publicationChoices (one per profile); ask the user, then call again with substackConnectionId set to the chosen publicationChoices[].substackConnectionId. An ambiguous publication value also returns publicationChoices."
    • changedInput schema / properties / substackConnectionId / description
      Previous value: -"Legacy internal Substack connection identifier retained for backward compatibility; publication is the public destination selector."New value: +"Exact Substack connection identifier, retained for backward compatibility, for example publicationChoices[].substackConnectionId from a requiresPublicationChoice result. publication is the preferred public destination selector; when both are given they must name the same publication."
    • addedOutput schema / properties / choiceScope
      Added value: +{
      +  "enum": [
      +    "publication",
      +    "profile"
      +  ],
      +  "type": "string"
      +}
    • changedOutput schema / properties / nextStep / oneOf
      Previous value: -[
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "arguments": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "confirmProfileDestination": {
      -            "const": true,
      -            "type": "boolean"
      -          }
      -        },
      -        "required": [
      -          "confirmProfileDestination"
      -        ],
      -        "type": "object"
      -      },
      -      "instruction": {
      -        "type": "string"
      -      },
      -      "tool": {
      -        "const": "schedule_note",
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "tool",
      -      "instruction",
      -      "arguments"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": false,
      -    "properties": {
      -      "action": {
      -        "const": "reconnect_substack_profile",
      -        "type": "string"
      -      },
      -      "instruction": {
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "action",
      -      "instruction"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "arguments": {
      +        "additionalProperties": false,
      +        "properties": {
      +          "confirmProfileDestination": {
      +            "const": true,
      +            "type": "boolean"
      +          }
      +        },
      +        "required": [
      +          "confirmProfileDestination"
      +        ],
      +        "type": "object"
      +      },
      +      "instruction": {
      +        "type": "string"
      +      },
      +      "tool": {
      +        "const": "schedule_note",
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "tool",
      +      "instruction",
      +      "arguments"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "action": {
      +        "const": "reconnect_substack_profile",
      +        "type": "string"
      +      },
      +      "instruction": {
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "action",
      +      "instruction"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": false,
      +    "properties": {
      +      "instruction": {
      +        "type": "string"
      +      },
      +      "tool": {
      +        "enum": [
      +          "schedule_article",
      +          "schedule_note"
      +        ],
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "tool",
      +      "instruction"
      +    ],
      +    "type": "object"
      +  }
      +]
    • addedOutput schema / properties / publicationChoiceReason
      Added value: +{
      +  "enum": [
      +    "not_specified",
      +    "ambiguous",
      +    "identity_unconfirmed"
      +  ],
      +  "type": "string"
      +}
    • addedOutput schema / properties / publicationChoices
      Added value: +{
      +  "items": {
      +    "additionalProperties": false,
      +    "properties": {
      +      "handle": {
      +        "type": "string"
      +      },
      +      "isDefault": {
      +        "type": "boolean"
      +      },
      +      "name": {
      +        "type": "string"
      +      },
      +      "substackConnectionId": {
      +        "type": "string"
      +      },
      +      "url": {
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "name",
      +      "handle",
      +      "url",
      +      "isDefault",
      +      "substackConnectionId"
      +    ],
      +    "type": "object"
      +  },
      +  "type": "array"
      +}
    • addedOutput schema / properties / requiresPublicationChoice
      Added value: +{
      +  "type": "boolean"
      +}
    • addedOutput schema / properties / substackPublicationSelection
      Added value: +{
      +  "additionalProperties": false,
      +  "properties": {
      +    "instruction": {
      +      "type": "string"
      +    },
      +    "message": {
      +      "type": "string"
      +    },
      +    "publication": {
      +      "additionalProperties": false,
      +      "properties": {
      +        "handle": {
      +          "type": "string"
      +        },
      +        "isDefault": {
      +          "type": "boolean"
      +        },
      +        "name": {
      +          "type": "string"
      +        },
      +        "substackConnectionId": {
      +          "type": "string"
      +        },
      +        "url": {
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "name",
      +        "handle",
      +        "url",
      +        "isDefault",
      +        "substackConnectionId"
      +      ],
      +      "type": "object"
      +    },
      +    "source": {
      +      "const": "remembered_choice",
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "source",
      +    "message",
      +    "publication",
      +    "instruction"
      +  ],
      +  "type": "object"
      +}
  15. Changed1 schema field changed
    • changedInput schema / properties / media / description
      Previous value: -"Optional media objects supporting image or video bytes as data URIs or base64."New value: +"Optional media objects supporting image or video bytes as data URIs or base64, or public HTTPS URLs. In ChatGPT, for a file the user attached in the chat, first call upload_media with it in file, then pass the returned publicUrl here as url."
  16. First observed

TDQS

A4.5/5.0
Behavior4/5

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

The description adds substantial behavior beyond the annotations: 24-hour duplicate suppression with duplicate:true and existing schedule ids, clientRequestId retry semantics, sentence-boundary truncation returning adjustedPlatforms and warnings, account-routing refusal when no default exists, and the RESYNC_SUBSTACK_SESSION meaning with an instruction to tell the writer. It does not contradict the annotations (idempotentHint=false is general, while the description documents a narrower request-level idempotency key). It loses a point only because the retry/dedup nuance sits at the very end of a dense block rather than being surfaced clearly.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The core purpose is front-loaded and almost every sentence carries real information, but the whole thing is a single dense block of roughly 340 words with no separation between routing rules, validation rules, and error semantics. Several details (character limits, publication routing) are repeated from the input schema descriptions, so some text does not earn incremental value.

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 25-parameter, nested-object tool this is comprehensive: it covers media requirements, platform limits and truncation, account routing, team workspace/writer routing, Substack profile selection, quote links, and retry safety. An output schema exists, yet the description still explains the important failure signals (requiresPublicationChoice, connectionWarnings, adjustedPlatforms), which is exactly what an agent needs to recover.

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 description coverage is 96%, so the baseline is 3, but the description adds cross-cutting meaning the schema cannot: per-platform character limits, that overlong text is shortened at a sentence boundary rather than rejected, that Substack renders each line as its own paragraph, and that several connected accounts without a default cause a refusal. Some of this restates the schema (publication, quoteUrl, platformVersions limits), which keeps it from a 5.

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?

The opening sentence names a specific verb (schedule) and resource (a note) and enumerates the exact platform set, plus an immediate constraint (Instagram, TikTok, Pinterest require media). It also explicitly distinguishes itself from schedule_notes and add_platform_to_scheduled_note, so an agent can route correctly without opening any schema.

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?

Gives explicit when-to-use and when-not-to-use guidance: 'To schedule several notes, prefer schedule_notes' and 'To send a Note that is already scheduled to another platform or account, use add_platform_to_scheduled_note instead: scheduling it again creates a separate Note.' It also points to list_social_accounts for account selection and preview_note_quote for link validation, with the exact condition that triggers each alternative.

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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