sign_message

A execute tool on the Waiaas MCP server.

SERVERWaiaas SOURCEminhoyoo-iotrust/waiaas

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/minhoyoo-iotrust-waiaas/sign-message.md

WHAT IT DOES

What sign_message does on Waiaas

AI agents invoke sign_message to trigger actions in Waiaas. 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.

RISK

Why sign_message is rated High

The description is empty, lowering confidence. However, in the context of a self-hosted wallet MCP server for AI agents handling crypto operations, 'sign_message' likely cryptographically signs a message or transaction using a private key. Signing can authorize transactions, approvals, or other on-chain operations, making it an Execute-level action.

From the tool's definition Tool name 'sign_message' on a crypto wallet MCP server that provides multi-chain crypto operations including transfers, DeFi, and payments.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs sign_message safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Waiaas, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sign_message, this is the rule to start with:

sign_message Rate-limited

sign_message 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": {
    "sign_message": {
      "limits": [
        {
          "counter": "sign_message_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Waiaas, apply this rule, and every sign_message call is checked against it from then on.

FAQ

Questions about sign_message

What does the sign_message tool do? +

sign_message is a execute tool on the Waiaas MCP server. It is categorised as a Execute tool in the Waiaas MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on sign_message? +

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

What risk level is sign_message? +

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

Can I rate-limit sign_message? +

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

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

sign_message is provided by the Waiaas MCP server (minhoyoo-iotrust/waiaas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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