store_document_chunks · estudIA- MCP: Risk & Policy

WHAT IT DOES

What store_document_chunks does on estudIA-MCP

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

WHY IT NEEDS A POLICY

Why store_document_chunks needs a policy

The name strongly suggests this tool writes document chunks to storage (likely Supabase vector storage based on server description). Storing data is a Write operation. Severity is medium as it could pollute or overwrite the vector store used for RAG queries. Confidence is reduced due to the empty description.

From the tool's definition Tool name 'store_document_chunks' implies storing/writing data; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

store_document_chunks Rate-limited

store_document_chunks 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": {
    "store_document_chunks": {
      "limits": [
        {
          "counter": "store_document_chunks_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 estudIA-MCP, so you can run agents against it safely.

FAQ

Questions about store_document_chunks

What does the store_document_chunks tool do? +

store_document_chunks. It is categorised as a Write tool in the estudIA-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 store_document_chunks? +

Register the estudIA- MCP server in PolicyLayer and add a rule for store_document_chunks: 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 estudIA-MCP. Nothing to install.

What risk level is store_document_chunks? +

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

Can I rate-limit store_document_chunks? +

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

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

store_document_chunks is provided by the estudIA- MCP server (jpaboytes/estudia-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.