AI agents call retrieve_balance_wallet to retrieve information from Zbd without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves wallet balance and project data from ZBD (a Bitcoin/Lightning payment platform). While it is a Read operation with no destructive effects, the severity is elevated to medium because unauthorized access to financial account data (wallet balances, transaction history) could expose sensitive financial information and enable fraud or unauthorized transaction decisions.
From the tool's definition Tool name contains 'retrieve' and description states 'Retrieve all data', both indicating a data retrieval operation with no side effects.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Retrieve all data about a ZBD Project. It is categorised as a Read tool in the Zbd MCP Server, which means it retrieves data without modifying state.
Register the Zbd MCP server in PolicyLayer and add a rule for retrieve_balance_wallet: 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 Zbd. Nothing to install.
retrieve_balance_wallet 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 retrieve_balance_wallet 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 retrieve_balance_wallet. 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.
retrieve_balance_wallet is provided by the Zbd MCP server (zebedeeio/zbd-payments-typescript-sdk). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
retrieve_balance_wallet is one line of Zbd's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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