insertWhiteboardImage

SERVERStable Baseline SOURCEhttps://api.stablebaseline.io/functions/v1/cloud-serve/mcp

Medium RISK CLASS

Category Write

Parameters 121 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-stablebaseline-sb/insertwhiteboardimage.md

WHAT IT DOES

What insertWhiteboardImage does on Stable Baseline

AI agents use insertWhiteboardImage to create or update resources in Stable Baseline, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Stable Baseline environment.

Parameter	Type	Required	Description
`x`	number	—	Top-left x on the canvas. Omit to auto-place.
`y`	number	—	Top-left y on the canvas. Omit to auto-place.
`align`	string	—	Horizontal alignment relative to existing content (placed below it). Ignored if x/y are provided.
`width`	number	—	Display width in px (resize). Defaults to ~360.
`height`	number	—	Display height in px. Derived from width at 4:3 if omitted.
`locked`	boolean	—	Lock the placed image so it cannot be moved, resized, or deleted by hand (e.g. a deck-owned framed slide image that changes only via the deck conversation). Def
`caption`	string	—	Optional caption shown as a text label grouped beneath the image.
`fileName`	string	—	Optional original filename (for storage + type hinting).
`imageUrl`	string	—	URL to fetch the image from, or an assetUrl returned by createImageUploadSession.
`customData`	object	—	Arbitrary Excalidraw customData stored on the element (e.g. { deckId } so a board image resolves back to its source deck). Merged with any builder-set customDat
`documentId`	string	Yes	The whiteboard's documentId.
`imageBase64`	string	—	Base64-encoded image bytes (a data: URL prefix is allowed). Best for small images.

Parameters from the server's own tool schema.

RISK

Why insertWhiteboardImage is rated Medium

An AI agent can call insertWhiteboardImage faster than any human can review: one bad instruction and it creates or modifies resources in Stable Baseline by the hundred, each call as confident as the last.

Risk signalsAccepts file system path (fileName) · High parameter count (14 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs insertWhiteboardImage safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Stable Baseline, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For insertWhiteboardImage, this is the rule to start with:

insertWhiteboardImage Rate-limited

insertWhiteboardImage stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "insertWhiteboardImage": {
      "limits": [
        {
          "counter": "insertwhiteboardimage_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Stable Baseline, apply this rule, and every insertWhiteboardImage call is checked against it from then on.

FAQ

Questions about insertWhiteboardImage

What does the insertWhiteboardImage tool do? +

Insert a real IMAGE (photo, screenshot, logo, picture) into a whiteboard — the storage-backed equivalent of insertImageInDocument. Provide the image as imageUrl (fetched and re-hosted), imageBase64, or imageBinary; for large files call createImageUploadSession(documentId) first then pass the returned assetUrl as imageUrl. The bytes are stored in the document-images bucket and the scene only holds a reference (never base64), exactly like pasted images. Options: caption (a text label placed + grouped beneath the image), width/height in px to RESIZE (if only one is given the other follows a 4:3 ratio; ~360px wide if neither), and placement via x/y (top-left) OR align ('left'|'center'|'right', positioned just below existing content) — omit both to auto-place to the right of the current content. After inserting, call getWhiteboardImage to verify. To move or resize the image later, patch its element via updateWhiteboardScene (mode:'patch' with {id, x, y, width, height}). For curated software-architecture ICONS (AWS/Docker/etc.) use addWhiteboardElements with an {type:'image', iconPath} spec instead. It is categorised as a Write tool in the Stable Baseline MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does insertWhiteboardImage accept? +

insertWhiteboardImage accepts 12 parameters: x, y, align, width, height, locked, caption, fileName, imageUrl, customData, documentId, imageBase64. Required: documentId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on insertWhiteboardImage? +

Register the Stable Baseline MCP server in PolicyLayer and add a rule for insertWhiteboardImage: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Stable Baseline. Nothing to install.

What risk level is insertWhiteboardImage? +

insertWhiteboardImage is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit insertWhiteboardImage? +

Yes. Add a rate_limit block to the insertWhiteboardImage rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block insertWhiteboardImage completely? +

Set action: deny in the PolicyLayer policy for insertWhiteboardImage. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides insertWhiteboardImage? +

insertWhiteboardImage is provided by the Stable Baseline MCP server (https://api.stablebaseline.io/functions/v1/cloud-serve/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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