pruva_update_document · Pruva MCP: Risk & Policy

WHAT IT DOES

What pruva_update_document does on Pruva

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

WHY IT NEEDS A POLICY

Why pruva_update_document needs a policy

The tool creates or modifies data reversibly by updating an existing document. This falls clearly into the Write category. Severity is medium because document updates could affect downstream AI context and decision-making, but the operation is reversible (unlike Destructive actions) and carries less risk than Execute or Financial operations.

From the tool's definition Tool name contains 'update' and description states 'Update an existing context document', indicating modification of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pruva_update_document Rate-limited

pruva_update_document 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": {
    "pruva_update_document": {
      "limits": [
        {
          "counter": "pruva_update_document_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 Pruva, so you can run agents against it safely.

FAQ

Questions about pruva_update_document

What does the pruva_update_document tool do? +

Update an existing context document. It is categorised as a Write tool in the Pruva MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pruva_update_document? +

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

What risk level is pruva_update_document? +

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

Can I rate-limit pruva_update_document? +

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

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

pruva_update_document is provided by the Pruva MCP server (pruva-ai/pruva-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.