cvat_replace_task_annotations · CVAT MCP: Risk & Policy

WHAT IT DOES

What cvat_replace_task_annotations does on CVAT MCP

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

WHY IT NEEDS A POLICY

Why cvat_replace_task_annotations needs a policy

This tool modifies existing annotation data within a task by replacing it with new content. While the operation overwrites prior annotations, it does not irreversibly delete the underlying task or destroy data in a way that cannot be recovered (annotations can typically be re-edited or restored from backups in annotation systems). This qualifies as Write rather than Destructive.

From the tool's definition Tool description states 'Replace task annotations with PUT /api/tasks/{id}/annotations/' — PUT operations modify data reversibly. The requirement for 'confirmReplace=true' indicates intentional overwrite capability rather than deletion.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cvat_replace_task_annotations Rate-limited

cvat_replace_task_annotations 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": {
    "cvat_replace_task_annotations": {
      "limits": [
        {
          "counter": "cvat_replace_task_annotations_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches CVAT MCP, so you can run agents against it safely.

FAQ

Questions about cvat_replace_task_annotations

What does the cvat_replace_task_annotations tool do? +

Replace task annotations with PUT /api/tasks/{id}/annotations/. Requires confirmReplace=true. It is categorised as a Write tool in the CVAT MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cvat_replace_task_annotations? +

Register the CVAT MCP server in PolicyLayer and add a rule for cvat_replace_task_annotations: 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 CVAT MCP. Nothing to install.

What risk level is cvat_replace_task_annotations? +

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

Can I rate-limit cvat_replace_task_annotations? +

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

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

cvat_replace_task_annotations is provided by the CVAT MCP server (jangjs1216/cvat-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.