add_database · RAG MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_database does on RAG MCP Server

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

WHY IT NEEDS A POLICY

Why add_database needs a policy

This tool creates a new database/knowledge base, which is a reversible Write operation. It modifies system state by adding a new resource but does not delete or destroy data. Severity is medium because an attacker could create numerous knowledge bases to consume storage or resources, but the action is not irreversible and does not affect existing data integrity or financial systems.

From the tool's definition Tool name 'add_database' combined with description '新建知识库' (Chinese: 'create knowledge base') indicates creation of a new knowledge base resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_database Rate-limited

add_database 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_database": {
      "limits": [
        {
          "counter": "add_database_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 RAG MCP Server, so you can run agents against it safely.

FAQ

Questions about add_database

What does the add_database tool do? +

新建知识库. It is categorised as a Write tool in the RAG 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 add_database? +

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

What risk level is add_database? +

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

Can I rate-limit add_database? +

Yes. Add a rate_limit block to the add_database 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_database completely? +

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

add_database is provided by the RAG MCP Server MCP server (sglwsjxh/rag-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.