update_visual · Cloudera Data Visualization MCP Server MCP

WHAT IT DOES

What update_visual does on Cloudera Data Visualization MCP Server

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

WHY IT NEEDS A POLICY

Why update_visual needs a policy

The tool modifies existing visual resources in Cloudera Data Visualization, which is a reversible write operation. It does not execute arbitrary code, delete data, or move financial resources. The blast radius is limited to the specific visual being updated and dependent on what modifications the AI agent makes to it.

From the tool's definition Tool name 'update_visual' and description 'Update an existing CDV visual by its numeric ID' indicate modification of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_visual Rate-limited

update_visual 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": {
    "update_visual": {
      "limits": [
        {
          "counter": "update_visual_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 Cloudera Data Visualization MCP Server, so you can run agents against it safely.

FAQ

Questions about update_visual

What does the update_visual tool do? +

Update an existing CDV visual by its numeric ID. It is categorised as a Write tool in the Cloudera Data Visualization MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_visual? +

Register the Cloudera Data Visualization MCP Server MCP server in PolicyLayer and add a rule for update_visual: 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 Cloudera Data Visualization MCP Server. Nothing to install.

What risk level is update_visual? +

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

Can I rate-limit update_visual? +

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

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

update_visual is provided by the Cloudera Data Visualization MCP Server MCP server (kevintalbert/cdv-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.