Retrieve the current Stripe account balance.
AI agents call get_balance to retrieve information from Green Helix without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only queries financial data (account balance) without creating charges, moving funds, or modifying state. It has no side effects and poses minimal risk — the blast radius of misuse is limited to information disclosure about account balance, which is low-impact compared to payments or refunds.
From the tool's definition Tool name 'get_balance' and description 'Retrieve the current Stripe account balance' — the verb 'Retrieve' and lack of any modification language indicate a read-only query operation.
Attacks that exploit this kind of access
Retrieve the current Stripe account balance. It is categorised as a Read tool in the Green Helix MCP Server, which means it retrieves data without modifying state.
Register the Green Helix MCP server in PolicyLayer and add a rule for get_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 Green Helix. Nothing to install.
get_balance is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_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.
Set action: deny in the PolicyLayer policy for get_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.
get_balance is provided by the Green Helix MCP server (mirni/a2a). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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