Postly MCP

Update Post

postly_update_post

Destructive

Updates editable content, media, labels, social or email/newsletter targets, and schedules for an existing Postly post. Accepts client-provided media references for import in the same action and returns the mutation result, platform readiness, blockers, and any required follow-up data.

Input Schema

TableJSON Schema

Name	Required	Description
`text`	No
`media`	No	Already-hosted media objects for the post. Use the media_file fields instead for attached, generated, selected, local, base64, or temporary media that Postly must import during the create or update action.
`labels`	No
`post_id`	Yes	Postly post ID.
`media_file`	No	Client-provided file reference or temporary URL for the first attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`campaign_id`	No	Optional campaign ID in the same workspace. Campaign content approval and workspace post approval still apply. Omit to preserve the association on update.
`media_file_2`	No	Client-provided file reference or temporary URL for the number 2 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`media_file_3`	No	Client-provided file reference or temporary URL for the number 3 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`media_file_4`	No	Client-provided file reference or temporary URL for the number 4 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`media_file_5`	No	Client-provided file reference or temporary URL for the number 5 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`media_file_6`	No	Client-provided file reference or temporary URL for the number 6 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`media_file_7`	No	Client-provided file reference or temporary URL for the number 7 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`media_file_8`	No	Client-provided file reference or temporary URL for the number 8 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`media_file_9`	No	Client-provided file reference or temporary URL for the number 9 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`email_subject`	No	Subject line required when targeting email/newsletter channels.
`first_comment`	No
`media_file_10`	No	Client-provided file reference or temporary URL for the number 10 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object.
`media_uploads`	No	Optional inline upload specs for agents that can supply public URLs, temporary URLs, base64, or data URLs. Postly imports these assets and appends them to media before creating or updating the post.
`audience_group`	No	Audience group ID or IDs. Do not combine with target_platforms. You may also pass a single string on clients that support that shorthand.
`platform_posts`	No	Platform-specific overrides. Each item should include identifier and settings. Call postly_get_channel_schema for each selected platform to see required settings and simple capture guidance.
`email_targeting`	No	Optional advanced email targeting map keyed by email integration ID. Each value is a resource ID, a resource object with id, or an array of those. Usually not needed when using email channel_id values returned by postly_list_social_accounts. Property values may use multiple equivalent input shapes; the server normalizes them.
`media_alt_texts`	No	Optional alt text values aligned with media_file, media_file_2, and later media_file fields.
`one_off_schedule`	No
`target_platforms`	No	Social platform names, email/newsletter, provider names, or channel IDs. Use "all" to target all connected publishing targets in the workspace. Email targets require email_subject and text. You may also pass a single string on clients that support that shorthand.
`publishing_preset`	No	Optional workspace publishing preset name. Use instead of publishing_preset_id.
`email_preview_text`	No	Optional short preview text for email/newsletter delivery.
`recurring_schedule`	No
`publishing_preset_id`	No	Optional workspace publishing preset ID. When omitted, Postly uses the preset named Default or the oldest saved preset.
`use_publishing_presets`	No	Apply the workspace publishing preset. Defaults to true. Set false only when the user explicitly wants platform defaults instead.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`code`	No
`data`	No
`prompt`	No
`status`	No
`message`	No
`next_steps`	No
`post_mutated`	No
`agent_guidance`	No
`ready_platforms`	No
`blocked_platforms`	No
`requires_user_input`	No
`retry_after_seconds`	No
`media_upload_results`	No
`missing_requirements`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedSep 29, 2026
- addedOutput schema / properties / media_upload_results
```
Added value: +{
+  "items": {
+    "type": "object"
+  },
+  "type": "array"
+}
```
- addedOutput schema / properties / post_mutated
```
Added value: +{
+  "type": "boolean"
+}
```
- addedOutput schema / properties / retry_after_seconds
```
Added value: +{
+  "type": "integer"
+}
```

Changed1 schema field changedSep 20, 2026

addedInput schema / properties / campaign_id

Added value: +{
+  "description": "Optional campaign ID in the same workspace. Campaign content approval and workspace post approval still apply. Omit to preserve the association on update.",
+  "type": "string"
+}

Changed4 schema fields changedSep 17, 2026

changed

Input 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."

changed

Input 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."

changedInput schema / 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 / 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."

Changed1 schema field changedSep 16, 2026

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."

Changed3 schema fields changedAug 27, 2026

addedInput schema / properties / publishing_preset

Added value: +{
+  "description": "Optional workspace publishing preset name. Use instead of publishing_preset_id.",
+  "type": "string"
+}

addedInput schema / properties / publishing_preset_id

Added value: +{
+  "description": "Optional workspace publishing preset ID. When omitted, Postly uses the preset named Default or the oldest saved preset.",
+  "type": "string"
+}

addedInput schema / properties / use_publishing_presets

Added value: +{
+  "description": "Apply the workspace publishing preset. Defaults to true. Set false only when the user explicitly wants platform defaults instead.",
+  "type": "boolean"
+}

Changed2 schema fields changedAug 9, 2026

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"
+]

Changed12 schema fields changedAug 1, 2026

changedInput schema / properties / email_subject / description

Previous value: -"Required when targeting email/newsletter channels. Generate a concise subject line if the user asks to publish to email and enough context is available."New value: +"Subject line required when targeting email/newsletter channels."

changedInput schema / properties / media / description

Previous value: -"Already-hosted media objects for the post. If the source is a ChatGPT-generated image, selected file, local file, base64 data, or temporary URL, prefer the media_file fields so Postly imports the asset inside this same create/update action."New value: +"Already-hosted media objects for the post. Use the media_file fields instead for attached, generated, selected, local, base64, or temporary media that Postly must import during the create or update action."

changedInput schema / properties / media_file / description

Previous value: -"ChatGPT/OpenAI file reference for the first attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the first attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_10 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 10 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 10 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_2 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 2 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 2 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_3 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 3 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 3 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_4 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 4 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 4 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_5 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 5 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 5 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_6 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 6 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 6 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_7 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 7 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 7 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_8 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 8 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 8 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

changedInput schema / properties / media_file_9 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 9 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."New value: +"Client-provided file reference or temporary URL for the number 9 attached, selected, or generated media file. Postly imports it during the create or update action. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

Changed52 schema fields changedJul 8, 2026

changedInput schema / properties / audience_group / description

Previous value: -"Audience group ID or IDs. Do not combine with target_platforms."New value: +"Audience group ID or IDs. Do not combine with target_platforms. You may also pass a single string on clients that support that shorthand."

addedInput schema / properties / audience_group / items
```
Added value: +{
+  "type": "string"
+}
```

removedInput schema / properties / audience_group / oneOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "items": {
-      "type": "string"
-    },
-    "type": "array"
-  }
-]

addedInput schema / properties / audience_group / type
```
Added value: +"array"
```

changedInput schema / properties / email_targeting / additionalProperties

Previous value: -{
-  "oneOf": [
-    {
-      "type": "string"
-    },
-    {
-      "additionalProperties": true,
-      "properties": {
-        "id": {
-          "description": "Email list, audience, publication, segment, or target ID.",
-          "type": "string"
-        },
-        "name": {
-          "type": "string"
-        }
-      },
-      "required": [
-        "id"
-      ],
-      "type": "object"
-    },
-    {
-      "items": {
-        "oneOf": [
-          {
-            "type": "string"
-          },
-          {
-            "additionalProperties": true,
-            "properties": {
-              "id": {
-                "description": "Email list, audience, publication, segment, or target ID.",
-                "type": "string"
-              },
-              "name": {
-                "type": "string"
-              }
-            },
-            "required": [
-              "id"
-            ],
-            "type": "object"
-          }
-        ]
-      },
-      "type": "array"
-    }
-  ]
-}New value: +true

changedInput schema / properties / email_targeting / description

Previous value: -"Optional advanced email targeting map keyed by email integration ID. Each value is a resource ID, a resource object with id, or an array of those. Usually not needed when using email channel_id values returned by postly_list_social_accounts."New value: +"Optional advanced email targeting map keyed by email integration ID. Each value is a resource ID, a resource object with id, or an array of those. Usually not needed when using email channel_id values returned by postly_list_social_accounts. Property values may use multiple equivalent input shapes; the server normalizes them."

removedInput schema / properties / media / items / properties / url / format
```
Removed value: -"uri"
```

changedInput schema / properties / media_file / description

Previous value: -"ChatGPT/OpenAI file reference for the first attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the first attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_10 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 10 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 10 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_10 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_10 / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_2 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 2 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 2 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_2 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_2 / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_3 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 3 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 3 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_3 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_3 / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_4 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 4 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 4 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_4 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_4 / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_5 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 5 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 5 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_5 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_5 / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_6 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 6 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 6 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_6 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_6 / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_7 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 7 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 7 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_7 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_7 / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_8 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 8 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 8 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_8 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_8 / type
```
Added value: +"string"
```

changedInput schema / properties / media_file_9 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 9 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 9 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post. Pass an HTTP(S) or temporary URL here. Some clients may also send a file-reference object."

removedInput schema / properties / media_file_9 / oneOf

Removed value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "download_url": {
-        "description": "Temporary download URL supplied by the MCP client.",
-        "format": "uri",
-        "type": "string"
-      },
-      "file_id": {
-        "type": "string"
-      },
-      "file_name": {
-        "type": "string"
-      },
-      "mime_type": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "download_url",
-      "file_id"
-    ],
-    "type": "object"
-  },
-  {
-    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
-    "format": "uri",
-    "pattern": "^https?://",
-    "type": "string"
-  }
-]

addedInput schema / properties / media_file_9 / type
```
Added value: +"string"
```
removedInput schema / properties / one_off_schedule / properties / one_off_date / format
```
Removed value: -"date"
```
removedInput schema / properties / one_off_schedule / properties / time / pattern
```
Removed value: -"^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$"
```
removedInput schema / properties / platform_posts / items / properties / media_override / items / properties / url / format
```
Removed value: -"uri"
```
removedInput schema / properties / platform_posts / items / properties / settings / properties / one_off_schedule / properties / one_off_date / format
```
Removed value: -"date"
```
removedInput schema / properties / platform_posts / items / properties / settings / properties / one_off_schedule / properties / time / pattern
```
Removed value: -"^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$"
```
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})?)?$"
```
removedInput schema / properties / recurring_schedule / properties / end_date / format
```
Removed value: -"date"
```
removedInput schema / properties / recurring_schedule / properties / start_date / format
```
Removed value: -"date"
```
removedInput schema / properties / recurring_schedule / properties / time / pattern
```
Removed value: -"^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$"
```

changedInput schema / properties / target_platforms / description

Previous value: -"Social platform names, email/newsletter, provider names, or channel IDs. Use \"all\" to target all connected publishing targets in the workspace. Email targets require email_subject and text."New value: +"Social platform names, email/newsletter, provider names, or channel IDs. Use \"all\" to target all connected publishing targets in the workspace. Email targets require email_subject and text. 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"
```

Changed8 schema fields changedJun 12, 2026

addedOutput schema / properties / agent_guidance
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / blocked_platforms

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / missing_requirements

Added value: +{
+  "items": {
+    "type": "object"
+  },
+  "type": "array"
+}

addedOutput schema / properties / next_steps

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / prompt
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / ready_platforms

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / requires_user_input
```
Added value: +{
+  "type": "boolean"
+}
```
addedOutput schema / properties / status
```
Added value: +{
+  "type": "string"
+}
```

Changed14 schema fields changedJun 5, 2026

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"
-}

changed

Input 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."

changed

Input 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."

Changed88 schema fields changedJun 4, 2026

changedInput schema / properties / email_targeting / additionalProperties

Previous value: -trueNew value: +{
+  "oneOf": [
+    {
+      "type": "string"
+    },
+    {
+      "additionalProperties": true,
+      "properties": {
+        "id": {
+          "description": "Email list, audience, publication, segment, or target ID.",
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id"
+      ],
+      "type": "object"
+    },
+    {
+      "items": {
+        "oneOf": [
+          {
+            "type": "string"
+          },
+          {
+            "additionalProperties": true,
+            "properties": {
+              "id": {
+                "description": "Email list, audience, publication, segment, or target ID.",
+                "type": "string"
+              },
+              "name": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          }
+        ]
+      },
+      "type": "array"
+    }
+  ]
+}

changedInput schema / properties / email_targeting / description

Previous value: -"Optional advanced email targeting map keyed by email integration ID. Usually not needed when using email channel_id values returned by postly.list_social_accounts."New value: +"Optional advanced email targeting map keyed by email integration ID. Each value is a resource ID, a resource object with id, or an array of those. Usually not needed when using email channel_id values returned by postly_list_social_accounts."

addedInput schema / properties / media / items / anyOf

Added value: +[
+  {
+    "required": [
+      "url"
+    ]
+  },
+  {
+    "required": [
+      "remote_url"
+    ]
+  }
+]

addedInput schema / properties / media / items / properties / name
```
Added value: +{
+  "type": "string"
+}
```

addedInput schema / properties / media / items / properties / remote_url / description

Added value: +"Public or Postly-hosted media URL. Either remote_url or url is required."

addedInput schema / properties / media / items / properties / remote_url / format
```
Added value: +"uri"
```

changedInput schema / properties / media / items / properties / type / description

Previous value: -"Media MIME family such as image/*, video/*, audio/*, or application/*."New value: +"Media type such as image, video, audio, image/png, video/mp4, or application/pdf."

addedInput schema / properties / media / items / properties / url / description

Added value: +"Public or Postly-hosted media URL. Either url or remote_url is required."

addedInput schema / properties / media / items / properties / url / format
```
Added value: +"uri"
```
removedInput schema / properties / media_file / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file / description

Previous value: -"ChatGPT/OpenAI file reference for the first attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the first attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_10 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_10 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 10 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 10 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_10 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_10 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_10 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_10 / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_2 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_2 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 2 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 2 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_2 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_2 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_2 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_2 / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_3 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_3 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 3 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 3 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_3 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_3 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_3 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_3 / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_4 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_4 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 4 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 4 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_4 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_4 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_4 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_4 / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_5 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_5 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 5 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 5 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_5 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_5 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_5 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_5 / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_6 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_6 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 6 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 6 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_6 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_6 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_6 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_6 / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_7 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_7 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 7 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 7 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_7 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_7 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_7 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_7 / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_8 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_8 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 8 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 8 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_8 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_8 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_8 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_8 / type
```
Removed value: -"object"
```
removedInput schema / properties / media_file_9 / additionalProperties
```
Removed value: -true
```

changedInput schema / properties / media_file_9 / description

Previous value: -"ChatGPT/OpenAI file reference for the number 9 attached, selected, or generated media file. Prefer this over calling postly.upload_media separately when creating or updating a post."New value: +"ChatGPT/OpenAI file reference for the number 9 attached, selected, or generated media file. Prefer this over calling postly_upload_media separately when creating or updating a post."

addedInput schema / properties / media_file_9 / oneOf

Added value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "download_url": {
+        "description": "Temporary download URL supplied by the MCP client.",
+        "format": "uri",
+        "type": "string"
+      },
+      "file_id": {
+        "type": "string"
+      },
+      "file_name": {
+        "type": "string"
+      },
+      "mime_type": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "download_url",
+      "file_id"
+    ],
+    "type": "object"
+  },
+  {
+    "description": "Compatibility fallback for clients that can only provide an http(s) URL. ChatGPT file params should normally provide the object shape.",
+    "format": "uri",
+    "pattern": "^https?://",
+    "type": "string"
+  }
+]

removedInput schema / properties / media_file_9 / properties

Removed value: -{
-  "download_url": {
-    "description": "Temporary download URL supplied by the MCP client.",
-    "type": "string"
-  },
-  "file_id": {
-    "type": "string"
-  },
-  "file_name": {
-    "type": "string"
-  },
-  "mime_type": {
-    "type": "string"
-  }
-}

removedInput schema / properties / media_file_9 / required
```
Removed value: -[
-  "download_url",
-  "file_id"
-]
```
removedInput schema / properties / media_file_9 / type
```
Removed value: -"object"
```
addedInput schema / properties / one_off_schedule / properties / one_off_date / description
```
Added value: +"Local calendar date for the one-time post, normally YYYY-MM-DD."
```
addedInput schema / properties / one_off_schedule / properties / one_off_date / format
```
Added value: +"date"
```

addedInput schema / properties / one_off_schedule / properties / time / description

Added value: +"Local time of day in 24-hour format, for example 09:00 or 18:30:00."

addedInput schema / properties / one_off_schedule / properties / time / pattern
```
Added value: +"^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$"
```

addedInput schema / properties / one_off_schedule / properties / timezone / description

Added value: +"IANA timezone used to interpret the local date and time, for example Africa/Lagos or America/New_York."

addedInput schema / properties / one_off_schedule / required

Added value: +[
+  "one_off_date",
+  "time",
+  "timezone"
+]

changedInput schema / properties / platform_posts / description

Previous value: -"Platform-specific overrides. Each item should include identifier and settings. Call postly.get_channel_schema for each selected platform to see required settings and simple capture guidance."New value: +"Platform-specific overrides. Each item should include identifier and settings. Call postly_get_channel_schema for each selected platform to see required settings and simple capture guidance."

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"
+]
```
addedInput schema / properties / recurring_schedule / properties / day_of_month
```
Added value: +{
+  "maximum": 31,
+  "minimum": 1,
+  "type": "integer"
+}
```
addedInput schema / properties / recurring_schedule / properties / end_date
```
Added value: +{
+  "format": "date",
+  "type": "string"
+}
```
addedInput schema / properties / recurring_schedule / properties / expression / description
```
Added value: +"Cron or rate expression describing the recurring schedule."
```

addedInput schema / properties / recurring_schedule / properties / rate_unit

Added value: +{
+  "enum": [
+    "minute",
+    "minutes",
+    "hour",
+    "hours",
+    "day",
+    "days",
+    "week",
+    "weeks"
+  ],
+  "type": "string"
+}

addedInput schema / properties / recurring_schedule / properties / rate_value
```
Added value: +{
+  "minimum": 1,
+  "type": "integer"
+}
```
addedInput schema / properties / recurring_schedule / properties / start_date
```
Added value: +{
+  "format": "date",
+  "type": "string"
+}
```

addedInput schema / properties / recurring_schedule / properties / time

Added value: +{
+  "pattern": "^\\d{1,2}:\\d{2}(:\\d{2}(\\.\\d{1,6})?)?$",
+  "type": "string"
+}

addedInput schema / properties / recurring_schedule / properties / timezone / description
```
Added value: +"IANA timezone used to interpret the recurring schedule."
```
addedInput schema / properties / recurring_schedule / required
```
Added value: +[
+  "expression",
+  "timezone"
+]
```

First observedMay 19, 2026

TDQS

A3.5/5.0

Behavior4/5

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

Annotations already declare destructiveHint=true, readOnlyHint=false, openWorldHint=true, and idempotentHint=false, covering the mutation safety profile. The description adds useful behavioral context beyond annotations: it accepts client-provided media references for import during the update action, and it returns mutation result, platform readiness, blockers, and required follow-up data. It does not, however, clarify whether omitted fields are preserved or cleared, leaving a gap for a destructive update tool.

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

Conciseness5/5

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

Two sentences, front-loaded with the core purpose, followed by a concise statement of media import and return behavior. No filler or repetition; every sentence contributes useful information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool is highly complex (29 parameters, nested objects, output schema present). The description covers the high-level scope and return data, which is adequate given the output schema. However, it omits important behavioral details such as whether updates are partial or full replacements, whether omitted fields are preserved, and whether platform-specific settings require prior validation via postly_get_channel_schema. This leaves the definition minimally viable but incomplete for a destructive update tool.

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 high (83%), so the schema already documents most parameters thoroughly. The description only broadly enumerates categories of updatable fields (content, media, labels, targets, schedules) without adding syntax, format, or handling details beyond what the schema provides. Baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states a specific verb ('Updates') and resource ('existing Postly post'), and lists the categories of editable content (content, media, labels, targets, schedules). It distinguishes this tool from creation by specifying 'existing', but does not explicitly name sibling tools like postly_create_post or postly_delete_post for contrast.

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

Usage Guidelines2/5

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

The description provides no guidance on when to use this tool versus alternatives such as postly_create_post, postly_validate_post, or postly_get_channel_schema. It implies use for updating an existing post but offers no explicit when-to-use, when-not-to-use, or alternative conditions.

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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