add_to_whitelist

Add an address to a TIP-403 policy whitelist.

SERVERTempo SOURCEarome3/tempo-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/arome3-tempo-mcp/add-to-whitelist.md

WHAT IT DOES

What add_to_whitelist does on Tempo

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

RISK

Why add_to_whitelist is rated Medium

This tool performs a create/modify operation on a policy whitelist rather than retrieving data (Read), executing arbitrary code (Execute), irreversibly deleting data (Destructive), or moving money (Financial).

From the tool's definition The tool 'add_to_whitelist' modifies a TIP-403 policy whitelist by adding an address, which is a data modification action. The description states 'Add an address to' the whitelist, indicating a reversible write operation (addresses can be removed).

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_to_whitelist safely

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

add_to_whitelist Rate-limited

add_to_whitelist 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": {
    "add_to_whitelist": {
      "limits": [
        {
          "counter": "add_to_whitelist_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about add_to_whitelist

What does the add_to_whitelist tool do? +

Add an address to a TIP-403 policy whitelist. It is categorised as a Write tool in the Tempo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_to_whitelist? +

Register the Tempo MCP server in PolicyLayer and add a rule for add_to_whitelist: 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 add_to_whitelist? +

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

Can I rate-limit add_to_whitelist? +

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

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

add_to_whitelist 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.

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