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Post Bridge

by io.github.jackfriks
OverviewDiscussionsAdmin

update_post

Destructive

Update a scheduled or draft post. You can change the caption, schedule time, accounts, or media.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYesThe post ID to update
mediaNoNew array of media IDs
captionNoNew caption text
is_draftNoSet draft status
media_urlsNoNew array of public media URLs
scheduled_atNoNew scheduled datetime (ISO 8601)
social_accountsNoNew array of social account IDs
account_configurationsNo
platform_configurationsNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • changedInput schema / properties / platform_configurations / properties / linkedin / description
      Previous value: -"LinkedIn overrides. Supports first_comment; document_title only matters for PDF (document) posts."New value: +"LinkedIn overrides. document_title only matters for PDF (document) posts."
    • removedInput schema / properties / platform_configurations / properties / linkedin / properties / first_comment
      Removed value: -{
-  "description": "Optional comment posted on the LinkedIn post immediately after it publishes (a 'first comment'), as the same person or page. A good spot for a link. Trimmed to 1,250 characters. A failed comment won't fail the post.",
-  "type": "string"
-}
  2. Changed2 schema fields changed
    • changedInput schema / properties / platform_configurations / properties / linkedin / description
      Previous value: -"LinkedIn overrides. document_title only matters for PDF (document) posts."New value: +"LinkedIn overrides. Supports first_comment; document_title only matters for PDF (document) posts."
    • addedInput schema / properties / platform_configurations / properties / linkedin / properties / first_comment
      Added value: +{
+  "description": "Optional comment posted on the LinkedIn post immediately after it publishes (a 'first comment'), as the same person or page. A good spot for a link. Trimmed to 1,250 characters. A failed comment won't fail the post.",
+  "type": "string"
+}
  3. Changed1 schema field changed
    • addedInput schema / properties / platform_configurations / properties / youtube / properties / has_paid_product_placement
      Added value: +{
+  "description": "Set true when the video includes paid product placement, a sponsorship or an endorsement. YouTube shows viewers an \"Includes paid promotion\" label. Maps to the YouTube Data API paidProductPlacementDetails.hasPaidProductPlacement field.",
+  "type": "boolean"
+}
  4. Changed10 schema fields changed
    • changedInput schema / properties / platform_configurations / properties / bluesky / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / facebook / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / google_business / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / instagram / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / linkedin / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / pinterest / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / threads / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / tiktok / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / twitter / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
    • changedInput schema / properties / platform_configurations / properties / youtube / properties / caption / description
      Previous value: -"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption."New value: +"Platform-specific caption. Overrides the top-level caption for this platform only. Omit to use the shared caption. Write one whenever the shared caption is longer than this platform allows (Bluesky 300, Threads 500, Pinterest 800, Google Business 1,500 characters; X 280 unless has_x_premium is true on the account) so nothing gets cut."
  5. First observed

TDQS

A3.7/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=false, destructiveHint=true and openWorldHint=true, so the mutation risk is covered structurally. The description adds the useful scope constraint (scheduled/draft only), but omits the critical update semantics — whether unspecified fields are preserved or wiped — and says nothing about auth or platform-side side effects.

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 short sentences with the primary action first and the editable surface second. Zero filler; every clause carries information.

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

Completeness5/5

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

Nine parameters including nested platform override objects and no output schema, but the schema itself is exhaustively documented per field (overrides, character limits, failure behavior). The description only needs to frame the operation, which it does adequately.

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 78%, so the schema already explains almost every parameter, including the deep platform_configurations overrides. The description names four field categories but adds no syntax, defaults, or interaction rules (e.g. top-level vs per-platform override precedence) beyond what the schema states.

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?

States a specific verb+resource ('Update a ... post') and enumerates the mutable fields (caption, schedule time, accounts, media). It scopes the target to 'scheduled or draft' posts, which distinguishes it from create_post/delete_post without needing the schema. No explicit sibling routing, though the sibling set makes the intent unambiguous.

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?

Implies a precondition (the post must be a scheduled or draft post) but never states what happens for published posts or when to choose update_post over delete_post + create_post. Usage is inferable rather than spelled out; no exclusions or alternatives are named.

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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