PrismPoster Creator Tools
com.prismposter/creator-toolsprismposter.comstreamable-httpv0.4.0Scanned
Social media frame sizes with sourced safe areas, plus aspect-ratio, bitrate and subtitle tools.
7 tools: 4 change things and 3 only read.
- Reads private data · 0
- Reads text others write · 1
- Can send data out · 0
- No findings
Anlyon alternative
4 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
7 tools
Changes things 4Claude Code: ask
calculate_aspect_ratioSimplify pixel dimensions to their aspect ratio, compute even-pixel encoder dimensions, solve a missing width or height, and optionally compute centre-crop and letterbox/pad plans …No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Simplify pixel dimensions to their aspect ratio, compute even-pixel encoder dimensions, solve a missing width or height, and optionally compute centre-crop and letterbox/pad plans for a target ratio.
convert_subtitlesParse, validate, time-shift, and convert subtitle files between SubRip (srt) and WebVTT (vtt).No findings
Why it is in this group
- The name "convert_subtitles" says "convert": a word for a change.
Description, as the server wrote it Parse, validate, time-shift, and convert subtitle files between SubRip (srt) and WebVTT (vtt). Reports overlapping, zero-duration, or out-of-order cues.
estimate_tempoEstimate BPM and stability from tap timestamps in milliseconds, or compute delay times (straight, dotted, triplet) and bar durations for a given BPM and time signature.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Estimate BPM and stability from tap timestamps in milliseconds, or compute delay times (straight, dotted, triplet) and bar durations for a given BPM and time signature.
estimate_video_bitrateEstimate encoded video file size (MB, GB, MiB, GiB) from duration and bitrate, or compute the maximum video bitrate that fits under a file-size cap (such as Discord 10 MB / 20 MB l…No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Estimate encoded video file size (MB, GB, MiB, GiB) from duration and bitrate, or compute the maximum video bitrate that fits under a file-size cap (such as Discord 10 MB / 20 MB limits).
Only reads 3Show 3 read-only tools
get_prismposter_capabilitiesRetrieve PrismPoster studio capabilities, AI video/image/music/Remake specifications, credit-pack pricing facts, and canonical URLs for citation.No findings
Why it is in this group
- The name "get_prismposter_capabilities" says "get": a word for reading.
Description, as the server wrote it Retrieve PrismPoster studio capabilities, AI video/image/music/Remake specifications, credit-pack pricing facts, and canonical URLs for citation.
get_social_media_placementGet exact frame dimensions, aspect ratio, first-party safe-area insets (px), usable box, and official documentation URL for a social media placement (e.g.Reads text others writeNo findings
Why it is in this group
- The name "get_social_media_placement" says "get": a word for reading.
What it can reach
- untrusted-inputThe description's first sentence says "get" and "url": it reads web pages, which anyone can write.
Description, as the server wrote it Get exact frame dimensions, aspect ratio, first-party safe-area insets (px), usable box, and official documentation URL for a social media placement (e.g. instagram-reels, tiktok-video, youtube-shorts, youtube-channel-banner). Optionally pass sourceWidth and sourceHeight to compute crop and letterbox plans.
list_social_media_placementsList all social media video and image placements with dimensions, aspect ratios, safe-area pixel insets, and first-party documentation URLs.No findings
Why it is in this group
- The name "list_social_media_placements" says "list": a word for reading.
Description, as the server wrote it List all social media video and image placements with dimensions, aspect ratios, safe-area pixel insets, and first-party documentation URLs. Optionally filter by platform.
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write1
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 0.4.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http creator-tools https://www.prismposter.com/api/mcpclaude mcp add --transport http creator-tools https://www.prismposter.com/api/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__creator-tools__get_social_media_placement",
"mcp__creator-tools__list_social_media_placements",
"mcp__creator-tools__get_prismposter_capabilities"
],
"ask": [
"mcp__creator-tools__calculate_aspect_ratio",
"mcp__creator-tools__estimate_video_bitrate",
"mcp__creator-tools__convert_subtitles",
"mcp__creator-tools__estimate_tempo"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as creator-tools. Review it before you use it.
Capability tags behind 1 rule
- mcp__creator-tools__get_social_media_placement untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/com.prismposter/creator-tools/verify?hash=ccdbb6df4913c864d1b4b2c4e276cf5acc6f93448b53ff23527ddf9b027491fd" | jq -e '.changed == false'Pinned hash ccdbb6df4913, from Oct 23, 2026, 16:25 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/com.prismposter/creator-tools/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/com.prismposter/creator-tools)Source: MCP Registry · repository. Synced Oct 23, 2026, 17:17 UTC.