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Validate Post

postly_validate_post
Read-onlyIdempotent

Checks proposed post text, media, platform settings, schedules, and targets against Postly and platform-specific requirements. Returns validation status, errors, warnings, platform readiness, and applicable limits.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
textNoPost text or caption to validate.
mediaNoOptional media objects that will be attached to the post.
workspace_idYesPostly workspace ID.
email_subjectNoRequired when validating a post for email/newsletter targets.
platform_postsNoOptional platform-specific overrides. Use postly_get_channel_schema for the selected platform before supplying settings.
one_off_scheduleNo
target_platformsNoOptional platform names, email/newsletter, provider names, or channel IDs. Use "all" or omit to validate against all connected workspace publishing targets. You may also pass a single string on clients that support that shorthand.
recurring_scheduleNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
emailNo
validNo
errorsNo
limitsNo
warningsNo
platformsNo
schedulesNo
agent_guidanceNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed5 schema fields changed
    • addedInput schema / properties / one_off_schedule
      Added value: +{
      +  "additionalProperties": true,
      +  "properties": {
      +    "one_off_date": {
      +      "description": "Local calendar date for the one-time post, normally YYYY-MM-DD.",
      +      "type": "string"
      +    },
      +    "time": {
      +      "description": "Local time of day in 24-hour format, for example 09:00 or 18:30:00.",
      +      "type": "string"
      +    },
      +    "timezone": {
      +      "description": "IANA timezone used to interpret the local date and time, for example Africa/Lagos or America/New_York.",
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "one_off_date",
      +    "time",
      +    "timezone"
      +  ],
      +  "type": "object"
      +}
    • changedInput schema / properties / platform_posts / items / properties / settings / properties / recurring_schedule / properties / expression / description
      Previous value: -"Cron or rate expression describing the recurring schedule."New value: +"AWS six-field cron or rate expression. rate(4 weeks) and every 4 weeks normalize to rate(28 days): elapsed duration, so local clock time may shift across daylight saving changes. Use cron for named-timezone wall-clock recurrence. recurring=true is inferred."
    • changedInput schema / properties / platform_posts / items / properties / settings / properties / recurring_schedule / properties / timezone / description
      Previous value: -"IANA timezone used to interpret the recurring schedule."New value: +"IANA timezone for cron wall-clock times and local start/end dates. Rate intervals remain elapsed duration across daylight saving changes."
    • addedInput schema / properties / recurring_schedule
      Added value: +{
      +  "additionalProperties": true,
      +  "properties": {
      +    "day_of_month": {
      +      "maximum": 31,
      +      "minimum": 1,
      +      "type": "integer"
      +    },
      +    "end_date": {
      +      "type": "string"
      +    },
      +    "expression": {
      +      "description": "AWS six-field cron or rate expression. rate(4 weeks) and every 4 weeks normalize to rate(28 days): elapsed duration, so local clock time may shift across daylight saving changes. Use cron for named-timezone wall-clock recurrence. recurring=true is inferred.",
      +      "type": "string"
      +    },
      +    "rate_unit": {
      +      "enum": [
      +        "minute",
      +        "minutes",
      +        "hour",
      +        "hours",
      +        "day",
      +        "days",
      +        "week",
      +        "weeks"
      +      ],
      +      "type": "string"
      +    },
      +    "rate_value": {
      +      "minimum": 1,
      +      "type": "integer"
      +    },
      +    "start_date": {
      +      "type": "string"
      +    },
      +    "time": {
      +      "type": "string"
      +    },
      +    "timezone": {
      +      "description": "IANA timezone for cron wall-clock times and local start/end dates. Rate intervals remain elapsed duration across daylight saving changes.",
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "expression",
      +    "timezone"
      +  ],
      +  "type": "object"
      +}
    • addedOutput schema / properties / schedules
      Added value: +{
      +  "items": {
      +    "type": "object"
      +  },
      +  "type": "array"
      +}
  2. Changed1 schema field changed
    • changedInput schema / properties / platform_posts / items / properties / settings / description
      Previous value: -"Optional platform-specific settings. Set only fields relevant to the selected platform. identifier is optional; when provided it must match platform_posts[].identifier. Call postly_get_channel_schema for exact platform guidance."New value: +"Optional platform-specific settings. Set only fields relevant to the selected platform. identifier is optional; when provided it must match platform_posts[].identifier. Blog connectors support posts only: Page/page_type/post_type requests are rejected. Call postly_get_channel_schema for exact platform guidance."
  3. Changed2 schema fields changed
    • changedInput schema / properties / platform_posts / items / properties / identifier / enum
      Previous value: -[
      -  "facebook",
      -  "fb",
      -  "fb_page",
      -  "fbpage",
      -  "facebook_page",
      -  "facebookpage",
      -  "meta_page",
      -  "metapage",
      -  "instagram",
      -  "insta",
      -  "ig",
      -  "linkedin",
      -  "linked_in",
      -  "linked",
      -  "lnkd",
      -  "linkdin",
      -  "linkedin_page",
      -  "linkedinpage",
      -  "x",
      -  "twitter",
      -  "x_twitter",
      -  "xtwitter",
      -  "googleMyBusiness",
      -  "google_my_business",
      -  "google_business",
      -  "googlebusiness",
      -  "google_business_profile",
      -  "googlebusinessprofile",
      -  "business_profile",
      -  "businessprofile",
      -  "google_maps",
      -  "googlemaps",
      -  "gmb",
      -  "gbp",
      -  "reddit",
      -  "pinterest",
      -  "pin",
      -  "youtube",
      -  "you_tube",
      -  "yt",
      -  "youtu",
      -  "yt_channel",
      -  "ytchannel",
      -  "youtube_channel",
      -  "youtubechannel",
      -  "youtube_shorts",
      -  "youtubeshorts",
      -  "tiktok",
      -  "tik_tok",
      -  "tik",
      -  "tok",
      -  "wordpress",
      -  "word_press",
      -  "wp",
      -  "blogger",
      -  "blogspot",
      -  "threads",
      -  "thread",
      -  "bluesky",
      -  "blue_sky",
      -  "bsky",
      -  "telegram",
      -  "tg",
      -  "tme",
      -  "whatsapp",
      -  "whats_app",
      -  "whats",
      -  "wa"
      -]New value: +[
      +  "facebook",
      +  "fb",
      +  "fb_page",
      +  "fbpage",
      +  "facebook_page",
      +  "facebookpage",
      +  "meta_page",
      +  "metapage",
      +  "instagram",
      +  "insta",
      +  "ig",
      +  "linkedin",
      +  "linked_in",
      +  "linked",
      +  "lnkd",
      +  "linkdin",
      +  "linkedin_page",
      +  "linkedinpage",
      +  "x",
      +  "twitter",
      +  "x_twitter",
      +  "xtwitter",
      +  "googleMyBusiness",
      +  "google_my_business",
      +  "google_business",
      +  "googlebusiness",
      +  "google_business_profile",
      +  "googlebusinessprofile",
      +  "business_profile",
      +  "businessprofile",
      +  "google_maps",
      +  "googlemaps",
      +  "gmb",
      +  "gbp",
      +  "reddit",
      +  "pinterest",
      +  "pin",
      +  "youtube",
      +  "you_tube",
      +  "yt",
      +  "youtu",
      +  "yt_channel",
      +  "ytchannel",
      +  "youtube_channel",
      +  "youtubechannel",
      +  "youtube_shorts",
      +  "youtubeshorts",
      +  "tiktok",
      +  "tik_tok",
      +  "tik",
      +  "tok",
      +  "wordpress",
      +  "word_press",
      +  "wp",
      +  "ghost",
      +  "hashnode",
      +  "hash_node",
      +  "devto",
      +  "dev_to",
      +  "dev.to",
      +  "forem",
      +  "blogger",
      +  "blogspot",
      +  "threads",
      +  "thread",
      +  "bluesky",
      +  "blue_sky",
      +  "bsky",
      +  "telegram",
      +  "tg",
      +  "tme",
      +  "whatsapp",
      +  "whats_app",
      +  "whats",
      +  "wa"
      +]
    • changedInput schema / properties / platform_posts / items / properties / settings / properties / identifier / enum
      Previous value: -[
      -  "facebook",
      -  "fb",
      -  "fb_page",
      -  "fbpage",
      -  "facebook_page",
      -  "facebookpage",
      -  "meta_page",
      -  "metapage",
      -  "instagram",
      -  "insta",
      -  "ig",
      -  "linkedin",
      -  "linked_in",
      -  "linked",
      -  "lnkd",
      -  "linkdin",
      -  "linkedin_page",
      -  "linkedinpage",
      -  "x",
      -  "twitter",
      -  "x_twitter",
      -  "xtwitter",
      -  "googleMyBusiness",
      -  "google_my_business",
      -  "google_business",
      -  "googlebusiness",
      -  "google_business_profile",
      -  "googlebusinessprofile",
      -  "business_profile",
      -  "businessprofile",
      -  "google_maps",
      -  "googlemaps",
      -  "gmb",
      -  "gbp",
      -  "reddit",
      -  "pinterest",
      -  "pin",
      -  "youtube",
      -  "you_tube",
      -  "yt",
      -  "youtu",
      -  "yt_channel",
      -  "ytchannel",
      -  "youtube_channel",
      -  "youtubechannel",
      -  "youtube_shorts",
      -  "youtubeshorts",
      -  "tiktok",
      -  "tik_tok",
      -  "tik",
      -  "tok",
      -  "wordpress",
      -  "word_press",
      -  "wp",
      -  "blogger",
      -  "blogspot",
      -  "threads",
      -  "thread",
      -  "bluesky",
      -  "blue_sky",
      -  "bsky",
      -  "telegram",
      -  "tg",
      -  "tme",
      -  "whatsapp",
      -  "whats_app",
      -  "whats",
      -  "wa"
      -]New value: +[
      +  "facebook",
      +  "fb",
      +  "fb_page",
      +  "fbpage",
      +  "facebook_page",
      +  "facebookpage",
      +  "meta_page",
      +  "metapage",
      +  "instagram",
      +  "insta",
      +  "ig",
      +  "linkedin",
      +  "linked_in",
      +  "linked",
      +  "lnkd",
      +  "linkdin",
      +  "linkedin_page",
      +  "linkedinpage",
      +  "x",
      +  "twitter",
      +  "x_twitter",
      +  "xtwitter",
      +  "googleMyBusiness",
      +  "google_my_business",
      +  "google_business",
      +  "googlebusiness",
      +  "google_business_profile",
      +  "googlebusinessprofile",
      +  "business_profile",
      +  "businessprofile",
      +  "google_maps",
      +  "googlemaps",
      +  "gmb",
      +  "gbp",
      +  "reddit",
      +  "pinterest",
      +  "pin",
      +  "youtube",
      +  "you_tube",
      +  "yt",
      +  "youtu",
      +  "yt_channel",
      +  "ytchannel",
      +  "youtube_channel",
      +  "youtubechannel",
      +  "youtube_shorts",
      +  "youtubeshorts",
      +  "tiktok",
      +  "tik_tok",
      +  "tik",
      +  "tok",
      +  "wordpress",
      +  "word_press",
      +  "wp",
      +  "ghost",
      +  "hashnode",
      +  "hash_node",
      +  "devto",
      +  "dev_to",
      +  "dev.to",
      +  "forem",
      +  "blogger",
      +  "blogspot",
      +  "threads",
      +  "thread",
      +  "bluesky",
      +  "blue_sky",
      +  "bsky",
      +  "telegram",
      +  "tg",
      +  "tme",
      +  "whatsapp",
      +  "whats_app",
      +  "whats",
      +  "wa"
      +]
  4. Changed11 schema fields changed
    • removedInput schema / properties / media / items / properties / url / format
      Removed value: -"uri"
    • removedInput schema / properties / platform_posts / items / properties / media_override / items / properties / url / format
      Removed value: -"uri"
    • removedInput schema / properties / platform_posts / items / properties / settings / properties / one_off_schedule / properties / one_off_date / format
      Removed value: -"date"
    • removedInput schema / properties / platform_posts / items / properties / settings / properties / one_off_schedule / properties / time / pattern
      Removed value: -"^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$"
    • removedInput schema / properties / platform_posts / items / properties / settings / properties / recurring_schedule / properties / end_date / format
      Removed value: -"date"
    • removedInput schema / properties / platform_posts / items / properties / settings / properties / recurring_schedule / properties / start_date / format
      Removed value: -"date"
    • removedInput schema / properties / platform_posts / items / properties / settings / properties / recurring_schedule / properties / time / pattern
      Removed value: -"^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$"
    • changedInput schema / properties / target_platforms / description
      Previous value: -"Optional platform names, email/newsletter, provider names, or channel IDs. Use \"all\" or omit to validate against all connected workspace publishing targets."New value: +"Optional platform names, email/newsletter, provider names, or channel IDs. Use \"all\" or omit to validate against all connected workspace publishing targets. You may also pass a single string on clients that support that shorthand."
    • addedInput schema / properties / target_platforms / items
      Added value: +{
      +  "type": "string"
      +}
    • removedInput schema / properties / target_platforms / oneOf
      Removed value: -[
      -  {
      -    "type": "string"
      -  },
      -  {
      -    "items": {
      -      "type": "string"
      -    },
      -    "type": "array"
      -  }
      -]
    • addedInput schema / properties / target_platforms / type
      Added value: +"array"
  5. Changed14 schema fields changed
    • removedInput schema / properties / media / items / anyOf
      Removed value: -[
      -  {
      -    "required": [
      -      "url"
      -    ]
      -  },
      -  {
      -    "required": [
      -      "remote_url"
      -    ]
      -  }
      -]
    • addedInput schema / properties / media / items / description
      Added value: +"Media object for an already-hosted file. Use url for the media location."
    • removedInput schema / properties / media / items / properties / remote_url
      Removed value: -{
      -  "description": "Public or Postly-hosted media URL. Either remote_url or url is required.",
      -  "format": "uri",
      -  "type": "string"
      -}
    • changedInput schema / properties / media / items / properties / url / description
      Previous value: -"Public or Postly-hosted media URL. Either url or remote_url is required."New value: +"Public or Postly-hosted media URL."
    • addedInput schema / properties / media / items / required
      Added value: +[
      +  "url"
      +]
    • removedInput schema / properties / platform_posts / items / properties / media_override / items / anyOf
      Removed value: -[
      -  {
      -    "required": [
      -      "url"
      -    ]
      -  },
      -  {
      -    "required": [
      -      "remote_url"
      -    ]
      -  }
      -]
    • addedInput schema / properties / platform_posts / items / properties / media_override / items / description
      Added value: +"Media object for an already-hosted file. Use url for the media location."
    • removedInput schema / properties / platform_posts / items / properties / media_override / items / properties / remote_url
      Removed value: -{
      -  "description": "Public or Postly-hosted media URL. Either remote_url or url is required.",
      -  "format": "uri",
      -  "type": "string"
      -}
    • changedInput schema / properties / platform_posts / items / properties / media_override / items / properties / url / description
      Previous value: -"Public or Postly-hosted media URL. Either url or remote_url is required."New value: +"Public or Postly-hosted media URL."
    • addedInput schema / properties / platform_posts / items / properties / media_override / items / required
      Added value: +[
      +  "url"
      +]
    • changedInput schema / properties / platform_posts / items / properties / settings / description
      Previous value: -"Platform-specific settings. identifier is optional; when provided it must match platform_posts[].identifier. Call postly_get_channel_schema for the exact platform guidance."New value: +"Optional platform-specific settings. Set only fields relevant to the selected platform. identifier is optional; when provided it must match platform_posts[].identifier. Call postly_get_channel_schema for exact platform guidance."
    • changedInput schema / properties / platform_posts / items / properties / settings / properties / recipient_phone_numbers / description
      Previous value: -"Required for WhatsApp template publishing."New value: +"WhatsApp recipient phone numbers. Provide them only when publishing a WhatsApp template message."
    • changedInput schema / properties / platform_posts / items / properties / settings / properties / template_name / description
      Previous value: -"Required for WhatsApp template publishing."New value: +"WhatsApp template name. Provide it only when publishing a WhatsApp template message."
    • changedInput schema / properties / platform_posts / items / properties / settings / properties / title / description
      Previous value: -"Required for YouTube, WordPress, Reddit, and Blogger posts."New value: +"Optional title metadata. Provide it for YouTube, WordPress, Reddit, or Blogger when those platforms are selected."
  6. Changed7 schema fields changed
    • addedInput schema / properties / media / items / additionalProperties
      Added value: +true
    • addedInput schema / properties / media / items / anyOf
      Added value: +[
      +  {
      +    "required": [
      +      "url"
      +    ]
      +  },
      +  {
      +    "required": [
      +      "remote_url"
      +    ]
      +  }
      +]
    • addedInput schema / properties / media / items / properties
      Added value: +{
      +  "alt_text": {
      +    "type": "string"
      +  },
      +  "name": {
      +    "type": "string"
      +  },
      +  "remote_url": {
      +    "description": "Public or Postly-hosted media URL. Either remote_url or url is required.",
      +    "format": "uri",
      +    "type": "string"
      +  },
      +  "type": {
      +    "description": "Media type such as image, video, audio, image/png, video/mp4, or application/pdf.",
      +    "type": "string"
      +  },
      +  "url": {
      +    "description": "Public or Postly-hosted media URL. Either url or remote_url is required.",
      +    "format": "uri",
      +    "type": "string"
      +  }
      +}
    • changedInput schema / properties / platform_posts / description
      Previous value: -"Optional platform-specific overrides. Use postly.get_channel_schema for the selected platform before supplying settings."New value: +"Optional platform-specific overrides. Use postly_get_channel_schema for the selected platform before supplying settings."
    • addedInput schema / properties / platform_posts / items / additionalProperties
      Added value: +true
    • addedInput schema / properties / platform_posts / items / properties
      Added value: +{
      +  "identifier": {
      +    "description": "Target platform for this override. Common aliases such as linked_in, google_my_business, and twitter are accepted and normalized before publishing. Must match one of the platforms selected by target_platforms.",
      +    "enum": [
      +      "facebook",
      +      "fb",
      +      "fb_page",
      +      "fbpage",
      +      "facebook_page",
      +      "facebookpage",
      +      "meta_page",
      +      "metapage",
      +      "instagram",
      +      "insta",
      +      "ig",
      +      "linkedin",
      +      "linked_in",
      +      "linked",
      +      "lnkd",
      +      "linkdin",
      +      "linkedin_page",
      +      "linkedinpage",
      +      "x",
      +      "twitter",
      +      "x_twitter",
      +      "xtwitter",
      +      "googleMyBusiness",
      +      "google_my_business",
      +      "google_business",
      +      "googlebusiness",
      +      "google_business_profile",
      +      "googlebusinessprofile",
      +      "business_profile",
      +      "businessprofile",
      +      "google_maps",
      +      "googlemaps",
      +      "gmb",
      +      "gbp",
      +      "reddit",
      +      "pinterest",
      +      "pin",
      +      "youtube",
      +      "you_tube",
      +      "yt",
      +      "youtu",
      +      "yt_channel",
      +      "ytchannel",
      +      "youtube_channel",
      +      "youtubechannel",
      +      "youtube_shorts",
      +      "youtubeshorts",
      +      "tiktok",
      +      "tik_tok",
      +      "tik",
      +      "tok",
      +      "wordpress",
      +      "word_press",
      +      "wp",
      +      "blogger",
      +      "blogspot",
      +      "threads",
      +      "thread",
      +      "bluesky",
      +      "blue_sky",
      +      "bsky",
      +      "telegram",
      +      "tg",
      +      "tme",
      +      "whatsapp",
      +      "whats_app",
      +      "whats",
      +      "wa"
      +    ],
      +    "type": "string"
      +  },
      +  "media_override": {
      +    "description": "Optional media to use for this platform instead of the base media.",
      +    "items": {
      +      "additionalProperties": true,
      +      "anyOf": [
      +        {
      +          "required": [
      +            "url"
      +          ]
      +        },
      +        {
      +          "required": [
      +            "remote_url"
      +          ]
      +        }
      +      ],
      +      "properties": {
      +        "alt_text": {
      +          "type": "string"
      +        },
      +        "name": {
      +          "type": "string"
      +        },
      +        "remote_url": {
      +          "description": "Public or Postly-hosted media URL. Either remote_url or url is required.",
      +          "format": "uri",
      +          "type": "string"
      +        },
      +        "type": {
      +          "description": "Media type such as image, video, audio, image/png, video/mp4, or application/pdf.",
      +          "type": "string"
      +        },
      +        "url": {
      +          "description": "Public or Postly-hosted media URL. Either url or remote_url is required.",
      +          "format": "uri",
      +          "type": "string"
      +        }
      +      },
      +      "type": "object"
      +    },
      +    "type": "array"
      +  },
      +  "settings": {
      +    "additionalProperties": true,
      +    "description": "Platform-specific settings. identifier is optional; when provided it must match platform_posts[].identifier. Call postly_get_channel_schema for the exact platform guidance.",
      +    "properties": {
      +      "description": {
      +        "type": "string"
      +      },
      +      "first_comment": {
      +        "type": "string"
      +      },
      +      "first_comments": {
      +        "items": {
      +          "additionalProperties": true,
      +          "type": "object"
      +        },
      +        "type": "array"
      +      },
      +      "identifier": {
      +        "description": "Optional platform identifier. Aliases are accepted and normalized to the canonical platform.",
      +        "enum": [
      +          "facebook",
      +          "fb",
      +          "fb_page",
      +          "fbpage",
      +          "facebook_page",
      +          "facebookpage",
      +          "meta_page",
      +          "metapage",
      +          "instagram",
      +          "insta",
      +          "ig",
      +          "linkedin",
      +          "linked_in",
      +          "linked",
      +          "lnkd",
      +          "linkdin",
      +          "linkedin_page",
      +          "linkedinpage",
      +          "x",
      +          "twitter",
      +          "x_twitter",
      +          "xtwitter",
      +          "googleMyBusiness",
      +          "google_my_business",
      +          "google_business",
      +          "googlebusiness",
      +          "google_business_profile",
      +          "googlebusinessprofile",
      +          "business_profile",
      +          "businessprofile",
      +          "google_maps",
      +          "googlemaps",
      +          "gmb",
      +          "gbp",
      +          "reddit",
      +          "pinterest",
      +          "pin",
      +          "youtube",
      +          "you_tube",
      +          "yt",
      +          "youtu",
      +          "yt_channel",
      +          "ytchannel",
      +          "youtube_channel",
      +          "youtubechannel",
      +          "youtube_shorts",
      +          "youtubeshorts",
      +          "tiktok",
      +          "tik_tok",
      +          "tik",
      +          "tok",
      +          "wordpress",
      +          "word_press",
      +          "wp",
      +          "blogger",
      +          "blogspot",
      +          "threads",
      +          "thread",
      +          "bluesky",
      +          "blue_sky",
      +          "bsky",
      +          "telegram",
      +          "tg",
      +          "tme",
      +          "whatsapp",
      +          "whats_app",
      +          "whats",
      +          "wa"
      +        ],
      +        "type": "string"
      +      },
      +      "one_off_schedule": {
      +        "additionalProperties": true,
      +        "properties": {
      +          "one_off_date": {
      +            "description": "Local calendar date for the one-time post, normally YYYY-MM-DD.",
      +            "format": "date",
      +            "type": "string"
      +          },
      +          "time": {
      +            "description": "Local time of day in 24-hour format, for example 09:00 or 18:30:00.",
      +            "pattern": "^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$",
      +            "type": "string"
      +          },
      +          "timezone": {
      +            "description": "IANA timezone used to interpret the local date and time, for example Africa/Lagos or America/New_York.",
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "one_off_date",
      +          "time",
      +          "timezone"
      +        ],
      +        "type": "object"
      +      },
      +      "privacy": {
      +        "enum": [
      +          "Public",
      +          "Private",
      +          "Unlisted"
      +        ],
      +        "type": "string"
      +      },
      +      "privacy_level": {
      +        "enum": [
      +          "PUBLIC_TO_EVERYONE",
      +          "MUTUAL_FOLLOW_FRIENDS",
      +          "FOLLOWER_OF_CREATOR",
      +          "SELF_ONLY"
      +        ],
      +        "type": "string"
      +      },
      +      "publishing_mode": {
      +        "description": "X publishing mode. Use thread, numbered_thread, or long_form for X text over 280 characters.",
      +        "enum": [
      +          "classic",
      +          "thread",
      +          "numbered_thread",
      +          "long_form"
      +        ],
      +        "type": "string"
      +      },
      +      "recipient_phone_numbers": {
      +        "description": "Required for WhatsApp template publishing.",
      +        "items": {
      +          "type": "string"
      +        },
      +        "type": "array"
      +      },
      +      "recurring_schedule": {
      +        "additionalProperties": true,
      +        "properties": {
      +          "day_of_month": {
      +            "maximum": 31,
      +            "minimum": 1,
      +            "type": "integer"
      +          },
      +          "end_date": {
      +            "format": "date",
      +            "type": "string"
      +          },
      +          "expression": {
      +            "description": "Cron or rate expression describing the recurring schedule.",
      +            "type": "string"
      +          },
      +          "rate_unit": {
      +            "enum": [
      +              "minute",
      +              "minutes",
      +              "hour",
      +              "hours",
      +              "day",
      +              "days",
      +              "week",
      +              "weeks"
      +            ],
      +            "type": "string"
      +          },
      +          "rate_value": {
      +            "minimum": 1,
      +            "type": "integer"
      +          },
      +          "start_date": {
      +            "format": "date",
      +            "type": "string"
      +          },
      +          "time": {
      +            "pattern": "^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$",
      +            "type": "string"
      +          },
      +          "timezone": {
      +            "description": "IANA timezone used to interpret the recurring schedule.",
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "expression",
      +          "timezone"
      +        ],
      +        "type": "object"
      +      },
      +      "template_name": {
      +        "description": "Required for WhatsApp template publishing.",
      +        "type": "string"
      +      },
      +      "title": {
      +        "description": "Required for YouTube, WordPress, Reddit, and Blogger posts.",
      +        "type": "string"
      +      }
      +    },
      +    "type": "object"
      +  },
      +  "text_override": {
      +    "description": "Optional text to use for this platform instead of the base text.",
      +    "type": "string"
      +  }
      +}
    • addedInput schema / properties / platform_posts / items / required
      Added value: +[
      +  "identifier"
      +]
  7. First observed

TDQS

A4/5.0
Behavior4/5

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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the description adds value by specifying what it checks and the composition of the response (status, errors, warnings, readiness, limits). It does not contradict annotations and provides behavioral context beyond the safety flags.

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?

A single, dense sentence that front-loads the action and outcome. No filler words, and it conveys the essential purpose and return value efficiently.

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?

The tool has an output schema (per signal), so the description need not explain return format in detail. It covers the main inputs and outputs, but lacks explicit guidance on when to use it relative to create/update flows. Given the complexity and the presence of annotations and output schema, it is nearly complete.

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

Parameters3/5

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

Schema description coverage is 75%, so most parameters are documented in the schema itself. The description summarizes parameter categories (text, media, platform settings, schedules, targets) but does not add detail beyond the schema's per-parameter descriptions. It adds marginal value over the schema.

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 description clearly states it validates post text, media, settings, schedules, and targets, and returns validation status, errors, warnings, readiness, and limits. It distinguishes itself from sibling tools like create/update/delete by being a non-mutating validation operation.

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 implies use before publishing (validating proposed posts) but does not explicitly state when to use it versus postly_create_post or postly_update_post, nor does it mention exclusions or prerequisites like calling postly_get_channel_schema first (which is referenced only in schema descriptions, not the main description).

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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