add_document · KnowledgeSmith MCP: Risk & Policy

WHAT IT DOES

What add_document does on KnowledgeSmith MCP

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

WHY IT NEEDS A POLICY

Why add_document needs a policy

The tool appears to create or add documents to a structured knowledge base. This is reversible (documents can be deleted), so it is Write rather than Destructive. The empty description reduces confidence slightly, but the server description and sibling tools provide sufficient context.

From the tool's definition Tool name 'add_document' combined with server's advertised 'complete CRUD functionality' and 'editing of structured RBT documents' indicates document creation capability.

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 KnowledgeSmith MCP, 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 KnowledgeSmith 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 add_document? +

Register the KnowledgeSmith 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 KnowledgeSmith MCP. 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 KnowledgeSmith MCP server (leo7nel23/knowledgesmith-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.