create_link_token · Enterprise MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_link_token does on Enterprise MCP Server

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

WHY IT NEEDS A POLICY

Why create_link_token needs a policy

This tool creates a Plaid Link token, which is a Write operation (creating a token/resource). While it is part of a financial workflow (connecting bank accounts via Plaid), the token creation itself does not move money or commit financial obligations — it merely initiates the account-linking UI flow.

From the tool's definition 'Create link token for Plaid Link' — creates a Plaid Link token, which is a short-lived token used to initialize the Plaid Link UI flow for connecting financial accounts

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_link_token Rate-limited

create_link_token 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": {
    "create_link_token": {
      "limits": [
        {
          "counter": "create_link_token_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 Enterprise MCP Server, so you can run agents against it safely.

FAQ

Questions about create_link_token

What does the create_link_token tool do? +

Create link token for Plaid Link. It is categorised as a Write tool in the Enterprise 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 create_link_token? +

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

What risk level is create_link_token? +

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

Can I rate-limit create_link_token? +

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

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

create_link_token is provided by the Enterprise MCP Server MCP server (jimestesblog/enterprise_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.