create_access_token · UseGrant MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_access_token does on UseGrant MCP Server

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

WHY IT NEEDS A POLICY

Why create_access_token needs a policy

This tool creates an access token, which is a Write operation (reversible by deletion). However, it carries high severity because access tokens grant authentication/authorization capabilities; a misused token could allow unauthorized access to systems or resources managed by the UseGrant platform.

From the tool's definition 'Create a new access token for a client' — creates a new credential/token

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_access_token Rate-limited

create_access_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_access_token": {
      "limits": [
        {
          "counter": "create_access_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 UseGrant MCP Server, so you can run agents against it safely.

FAQ

Questions about create_access_token

What does the create_access_token tool do? +

Create a new access token for a client. It is categorised as a Write tool in the UseGrant 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_access_token? +

Register the UseGrant MCP Server MCP server in PolicyLayer and add a rule for create_access_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 UseGrant MCP Server. Nothing to install.

What risk level is create_access_token? +

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

Can I rate-limit create_access_token? +

Yes. Add a rate_limit block to the create_access_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_access_token completely? +

Set action: deny in the PolicyLayer policy for create_access_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_access_token? +

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