ensure_approvals · Baselings MCP: Risk & Policy

WHAT IT DOES

What ensure_approvals does on Baselings

AI agents invoke ensure_approvals to trigger actions in Baselings. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why ensure_approvals needs a policy

While the tool itself does not directly transfer funds (which would be Financial), it executes smart contract approval transactions that are prerequisites for financial operations. Approvals are Execute-category actions because they trigger external blockchain operations whose effects are consequential and binding.

From the tool's definition Tool performs 'Set up all token approvals' on blockchain, which executes transactions that change approval state for tokens. This is an irreversible authorization action that enables subsequent financial transactions.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ensure_approvals Rate-limited

ensure_approvals stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ensure_approvals": {
      "limits": [
        {
          "counter": "ensure_approvals_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Baselings, so you can run agents against it safely.

FAQ

Questions about ensure_approvals

What does the ensure_approvals tool do? +

Set up all token approvals needed to play (run this first before any write actions). It is categorised as a Execute tool in the Baselings MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on ensure_approvals? +

Register the Baselings MCP server in PolicyLayer and add a rule for ensure_approvals: 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 Baselings. Nothing to install.

What risk level is ensure_approvals? +

ensure_approvals is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit ensure_approvals? +

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

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

ensure_approvals is provided by the Baselings MCP server (jimbo530/baselings-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.