sanity_create · Sanity MCP Server MCP: Risk & Policy

WHAT IT DOES

What sanity_create does on Sanity MCP Server

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

WHY IT NEEDS A POLICY

Why sanity_create needs a policy

This tool creates new documents in a content management system. Creation is a reversible write operation (documents can be modified or deleted later). While the blast radius is moderate if an agent creates unwanted content at scale, it does not commit financial transactions, execute arbitrary code, or permanently destroy data.

From the tool's definition Tool name 'sanity_create' and description 'Create a new document in Sanity CMS' directly indicate document creation, a reversible write operation. The requirement for a 'write token' confirms it modifies data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sanity_create Rate-limited

sanity_create 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": {
    "sanity_create": {
      "limits": [
        {
          "counter": "sanity_create_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 Sanity MCP Server, so you can run agents against it safely.

FAQ

Questions about sanity_create

What does the sanity_create tool do? +

Create a new document in Sanity CMS. Requires write token. It is categorised as a Write tool in the Sanity 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 sanity_create? +

Register the Sanity MCP Server MCP server in PolicyLayer and add a rule for sanity_create: 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 Sanity MCP Server. Nothing to install.

What risk level is sanity_create? +

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

Can I rate-limit sanity_create? +

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

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

sanity_create is provided by the Sanity MCP Server MCP server (purple-horizons/sanity-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.