get_sponsor_balance

Get the token balance of a fee sponsor account.

SERVERTempo SOURCEarome3/tempo-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/arome3-tempo-mcp/get-sponsor-balance.md

WHAT IT DOES

What get_sponsor_balance does on Tempo

AI agents call get_sponsor_balance to retrieve information from Tempo without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_sponsor_balance is rated Low

This tool performs a read-only retrieval of balance data. While it operates in a financial system, it does not move money, commit financial obligations, execute code, or modify data. The action is a simple information retrieval that returns current state without side effects.

From the tool's definition Tool name 'get_sponsor_balance' and description 'Get the token balance of a fee sponsor account' indicate a query operation that retrieves account balance information without modifying state.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_sponsor_balance 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 get_sponsor_balance, this is the rule to start with:

get_sponsor_balance Allowed

get_sponsor_balance is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_sponsor_balance": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about get_sponsor_balance

What does the get_sponsor_balance tool do? +

Get the token balance of a fee sponsor account. It is categorised as a Read tool in the Tempo MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_sponsor_balance? +

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

get_sponsor_balance is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_sponsor_balance? +

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

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

get_sponsor_balance 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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