Get account balances, credit status, and spending estimates. Defaults to the caller
AI agents call credit_balance to retrieve information from Manifest MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves financial account information (balances, credit status, spending estimates) without performing any transactions, transfers, or financial commitments. It is a read-only query operation that returns data to inform the user. While it involves financial data, it does not move money or create obligations, so it does not meet the Financial category threshold.
From the tool's definition Tool description states 'Get account balances, credit status, and spending estimates' - these are information retrieval operations with no modification or side effects. The phrase 'Defaults to the caller' indicates it queries existing data about accounts.
Attacks that exploit this kind of access
Get account balances, credit status, and spending estimates. Defaults to the caller. It is categorised as a Read tool in the Manifest MCP MCP Server, which means it retrieves data without modifying state.
Register the Manifest MCP server in PolicyLayer and add a rule for credit_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 Manifest MCP. Nothing to install.
credit_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 credit_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 credit_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.
credit_balance is provided by the Manifest MCP server (manifest-network/manifest-mcp-mono). 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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