visual_open_annotator

Open an interactive visual annotation UI in Live Canvas for a workspace image.

SERVERCoWork OS SOURCECoWork-OS/CoWork-OS

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cowork-os/visual-open-annotator.md

WHAT IT DOES

What visual_open_annotator does on CoWork OS

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

RISK

Why visual_open_annotator is rated Medium

The tool opens an annotation interface that allows users to add annotations (markings, notes, labels) to an image, which constitutes creating or modifying data. It is not purely read-only since annotations are written/overlaid onto the image workspace. It is reversible (annotations can typically be removed), so Write is the most appropriate category rather than Destructive.

From the tool's definition Open an interactive visual annotation UI in Live Canvas for a workspace image

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs visual_open_annotator safely

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

visual_open_annotator Rate-limited

visual_open_annotator 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": {
    "visual_open_annotator": {
      "limits": [
        {
          "counter": "visual_open_annotator_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 CoWork OS, apply this rule, and every visual_open_annotator call is checked against it from then on.

FAQ

Questions about visual_open_annotator

What does the visual_open_annotator tool do? +

Open an interactive visual annotation UI in Live Canvas for a workspace image. It is categorised as a Write tool in the CoWork OS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on visual_open_annotator? +

Register the CoWork OS MCP server in PolicyLayer and add a rule for visual_open_annotator: 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 CoWork OS. Nothing to install.

What risk level is visual_open_annotator? +

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

Can I rate-limit visual_open_annotator? +

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

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

visual_open_annotator is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on CoWork OS, and thousands of servers like it.

This server

All 342 CoWork OS tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →