editWhiteboardImageRegion

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

Medium RISK CLASS

Category Write

Parameters 54 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

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

WHAT IT DOES

What editWhiteboardImageRegion does on Stable Baseline

AI agents use editWhiteboardImageRegion 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
`prompt`	string	Yes	What to put in the masked area, in plain language (e.g. 'replace the car with a red bicycle').
`strength`	number	—	Optional 0..1 — how far the regenerated area may diverge from the original. Ignored by FLUX Fill (which balances via the prompt); leave unset unless using a non
`elementId`	string	Yes	The id of the image element on the board to edit (from getWhiteboard includeElements=true).
`documentId`	string	Yes	The whiteboard document that holds the image element.
`maskBase64`	string	Yes	A PNG mask (base64, with or without a data: prefix) the same shape as the image. WHITE pixels are regenerated; BLACK pixels are preserved.

Parameters from the server's own tool schema.

RISK

Why editWhiteboardImageRegion is rated Medium

This tool creates or modifies data (whiteboard image content) reversibly. While it uses generative AI (inpainting), the actual effect is a modification of stored image data in place.

From the tool's definition Tool description states it 'regenerates only the masked region' and 'replaces the image IN PLACE', explicitly modifying image content on a whiteboard element.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs editWhiteboardImageRegion 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 editWhiteboardImageRegion, this is the rule to start with:

editWhiteboardImageRegion Rate-limited

editWhiteboardImageRegion 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": {
    "editWhiteboardImageRegion": {
      "limits": [
        {
          "counter": "editwhiteboardimageregion_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 editWhiteboardImageRegion call is checked against it from then on.

FAQ

Questions about editWhiteboardImageRegion

What does the editWhiteboardImageRegion tool do? +

Mask-edit (inpaint) one region of an image element on a whiteboard. Given the target image element id and a paint MASK (a PNG where WHITE marks the area to regenerate and BLACK is kept), it regenerates only the masked region using the prompt and replaces the image IN PLACE (same position + size). This is mainly used by the in-app image-board mask editor for boards designed with designProfile:'image'. It is available to every organisation; the small flat credit charge is the only gate (refunded automatically if the edit fails on our side). 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 editWhiteboardImageRegion accept? +

editWhiteboardImageRegion accepts 5 parameters: prompt, strength, elementId, documentId, maskBase64. Required: prompt, elementId, documentId, maskBase64. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on editWhiteboardImageRegion? +

Register the Stable Baseline MCP server in PolicyLayer and add a rule for editWhiteboardImageRegion: 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 editWhiteboardImageRegion? +

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

Can I rate-limit editWhiteboardImageRegion? +

Yes. Add a rate_limit block to the editWhiteboardImageRegion 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 editWhiteboardImageRegion completely? +

Set action: deny in the PolicyLayer policy for editWhiteboardImageRegion. 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 editWhiteboardImageRegion? +

editWhiteboardImageRegion 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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