# editWhiteboardImageRegion

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).

Agent View of the PolicyLayer registry record for `editWhiteboardImageRegion`. HTML page: https://policylayer.com/tools/io-stablebaseline-sb/editwhiteboardimageregion

## Facts

- Tool: `editWhiteboardImageRegion`
- Server: Stable Baseline (`https://api.stablebaseline.io/functions/v1/cloud-serve/mcp`) — https://policylayer.com/tools/io-stablebaseline-sb.md
- Homepage: https://github.com/stablebaseline/mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: https://app.stablebaseline.io
- Server rate-limited: no
- Parameters: 5 (4 required)
- Recommended policy verdict: Rate-limited

## Parameters

| 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 | no | 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.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "editWhiteboardImageRegion",
    "arguments": {
      "prompt": "<prompt>",
      "elementId": "<elementId>",
      "documentId": "<documentId>",
      "maskBase64": "<maskBase64>"
    }
  }
}
```

## 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 own 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 signals: Bulk/mass operation — affects multiple targets

## Use case

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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Stable Baseline:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "editWhiteboardImageRegion": {
      "limits": [
        {
          "counter": "editwhiteboardimageregion_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Stable Baseline (195)

- `cancelAllKgInScope` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/cancelallkginscope.md
- `cancelKgBuildBatch` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/cancelkgbuildbatch.md
- `deleteDiagramInDocument` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletediagramindocument.md
- `deleteDocument` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletedocument.md
- `deleteFolder` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletefolder.md
- `deleteImageInDocument` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteimageindocument.md
- `deleteImprovement` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteimprovement.md
- `deleteImprovementCategory` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteimprovementcategory.md
- `deleteImprovementComment` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteimprovementcomment.md
- `deletePlan` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteplan.md
- `deletePlanComment` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteplancomment.md
- `deletePlanPhase` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteplanphase.md
- `deleteResourcePermission` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteresourcepermission.md
- `deleteTaskDependency` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletetaskdependency.md
- `deleteTeam` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteteam.md
- `deleteVegaDataFile` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletevegadatafile.md
- `deleteWhiteboard` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletewhiteboard.md
- `removeMember` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/removemember.md
- `removeTeamMember` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/removeteammember.md
- `removeWorkspaceMember` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/removeworkspacemember.md
- `resetDocumentInBrain` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/resetdocumentinbrain.md
- `revokeTeamWorkspaceAccess` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/revoketeamworkspaceaccess.md
- `autoDesignWhiteboard` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/autodesignwhiteboard.md
- `renderDiagram` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/renderdiagram.md
- `startMeetingScribe` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/startmeetingscribe.md
- `stopMeetingScribe` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/stopmeetingscribe.md
- `triggerKgRebuild` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/triggerkgrebuild.md
- `applySubscriptionChange` — Financial — https://policylayer.com/tools/io-stablebaseline-sb/applysubscriptionchange.md
- `cancelSubscription` — Financial — https://policylayer.com/tools/io-stablebaseline-sb/cancelsubscription.md
- `getCustomerPortalLink` — Financial — https://policylayer.com/tools/io-stablebaseline-sb/getcustomerportallink.md
- …and 165 more: https://policylayer.com/tools/io-stablebaseline-sb.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-stablebaseline-sb · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-stablebaseline-sb