deploy_contract · Tenzro Ledger MCP: Risk & Policy

WHAT IT DOES

What deploy_contract does on Tenzro Ledger MCP

AI agents invoke deploy_contract to trigger actions in Tenzro Ledger MCP. 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 deploy_contract needs a policy

While deployment itself doesn't directly delete or move funds, it executes code on blockchain systems, making it Execute category. Severity is high because a malicious or erroneous deployment could result in substantial financial losses, locked funds, or unintended smart contract behavior affecting multiple users.

From the tool's definition The tool deploys bytecode to multiple blockchain runtimes (EVM, SVM, DAML). Deployment is a code execution operation that triggers external smart contract effects.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

deploy_contract Rate-limited

deploy_contract 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": {
    "deploy_contract": {
      "limits": [
        {
          "counter": "deploy_contract_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 Tenzro Ledger MCP, so you can run agents against it safely.

FAQ

Questions about deploy_contract

What does the deploy_contract tool do? +

Deploy bytecode to the EVM, SVM, or DAML runtime. It is categorised as a Execute tool in the Tenzro Ledger MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on deploy_contract? +

Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for deploy_contract: 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 Tenzro Ledger MCP. Nothing to install.

What risk level is deploy_contract? +

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

Can I rate-limit deploy_contract? +

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

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

deploy_contract is provided by the Tenzro Ledger MCP server (https://canton-mcp.tenzro.network/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.