add_document · FastMCP Document Analyzer MCP: Risk & Policy

WHAT IT DOES

What add_document does on FastMCP Document Analyzer

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

WHY IT NEEDS A POLICY

Why add_document needs a policy

The tool creates or modifies data reversibly by adding documents to the system. This is a Write operation—it introduces new data into storage without permanent deletion. Severity is medium because unauthorized document addition could clutter the system or introduce malicious content, but the operation is reversible via the delete_document tool also present on this server.

From the tool's definition Tool name 'add_document' and context of document management system indicate creation of new documents. Description is empty, preventing full certainty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_document Rate-limited

add_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": {
    "add_document": {
      "limits": [
        {
          "counter": "add_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 FastMCP Document Analyzer, so you can run agents against it safely.

FAQ

Questions about add_document

What does the add_document tool do? +

add_document. It is categorised as a Write tool in the FastMCP Document Analyzer MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_document? +

Register the FastMCP Document Analyzer MCP server in PolicyLayer and add a rule for add_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 FastMCP Document Analyzer. Nothing to install.

What risk level is add_document? +

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

Can I rate-limit add_document? +

Yes. Add a rate_limit block to the add_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 add_document completely? +

Set action: deny in the PolicyLayer policy for add_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 add_document? +

add_document is provided by the FastMCP Document Analyzer MCP server (tathagat017/document-analyser-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.