schedule_payment

THE RISK

Critical Risk

Why schedule_payment needs a policy

This tool schedules a future payment on the Tempo blockchain stablecoin network. It directly commits financial obligations that will execute autonomously at a future time. Even though it may be cancellable (given the sibling 'cancel_scheduled_payment' tool exists), the act of scheduling constitutes a financial commitment.

From the tool's definition 'Create a scheduled payment that executes at a future time on Tempo blockchain' — explicitly commits a financial payment obligation on the blockchain

Documented attack patterns abuse exactly the kind of access schedule_payment gives an agent:

POLICY

How to control schedule_payment

PolicyLayer is an MCP gateway — it sits between your AI agents and Tempo, and nothing reaches the server without passing your rules. This is the rule we recommend for schedule_payment:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "schedule_payment": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to schedule_payment is blocked until a human approves it. The rest of the server keeps working.

Create a free account and register Tempo — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

More Tempo tools

Financial cancel_order Cancel an open order on the DEX. The remaining unfilled amount will be Financial cancel_scheduled_payment Cancel a pending scheduled payment before it executes. Financial swap_stablecoins Execute a stablecoin swap on Tempo DEX. Financial claim_rewards Claim all pending rewards for a TIP-20 token. Rewards are sent to your wallet Financial distribute_rewards Distribute rewards to all opted-in holders of a TIP-20 token. Financial mint_tokens Mint new TIP-20 tokens to a recipient address. Financial opt_in_rewards Opt into rewards for a TIP-20 token. After opting in, you will earn rewards Financial opt_out_rewards Opt out of rewards for a TIP-20 token. By default, any pending rewards will be

All 61 Tempo tools →

Financial tools on other servers

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Go deeper

Govern MCP payment tools → Approval gates, spend caps, and per-identity scopes on every refund, payout, and charge your agents make.
Critical-risk tools in Tempo → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about schedule_payment

What does the schedule_payment tool do? +

Create a scheduled payment that executes at a future time on Tempo blockchain. It is categorised as a Financial tool in the Tempo MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on schedule_payment? +

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

What risk level is schedule_payment? +

schedule_payment is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit schedule_payment? +

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

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

schedule_payment is provided by the Tempo MCP server (arome3/tempo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Tempo tool call.

Start from Tempo, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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