prismic_upsert_document · Prismic Content MCP: Risk & Policy

WHAT IT DOES

What prismic_upsert_document does on Prismic Content MCP

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

WHY IT NEEDS A POLICY

Why prismic_upsert_document needs a policy

Upsert operations (update or insert) create or modify data in a content management system without irreversibly deleting it. This is a Write category action. Severity is high because unintended document modifications in a CMS could affect published content, user experience, and business operations, though the action remains reversible.

From the tool's definition Tool name 'prismic_upsert_document' indicates creation or modification of documents. Server description mentions 'managing...content migrations or updates' and 'secure write operations,' confirming this tool performs reversible data modifications.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

prismic_upsert_document Rate-limited

prismic_upsert_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": {
    "prismic_upsert_document": {
      "limits": [
        {
          "counter": "prismic_upsert_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 Prismic Content MCP, so you can run agents against it safely.

FAQ

Questions about prismic_upsert_document

What does the prismic_upsert_document tool do? +

prismic_upsert_document. It is categorised as a Write tool in the Prismic Content 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 prismic_upsert_document? +

Register the Prismic Content MCP server in PolicyLayer and add a rule for prismic_upsert_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 Prismic Content MCP. Nothing to install.

What risk level is prismic_upsert_document? +

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

Can I rate-limit prismic_upsert_document? +

Yes. Add a rate_limit block to the prismic_upsert_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 prismic_upsert_document completely? +

Set action: deny in the PolicyLayer policy for prismic_upsert_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 prismic_upsert_document? +

prismic_upsert_document is provided by the Prismic Content MCP server (rahulpowar/prismic-content-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.