Query Stacks transactions for an address with advanced filtering.
AI agents call stx_query_transactions to retrieve information from Bitcoin wallet MCP server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical transaction data for analysis and monitoring purposes. Querying is a read-only operation with no side effects on wallet state, funds, or blockchain records. While it operates in a financial context (cryptocurrency), the tool itself performs no financial transactions, movements of funds, or irreversible actions.
From the tool's definition Tool name 'stx_query_transactions' and description 'Query Stacks transactions for an address with advanced filtering' indicate data retrieval and querying operations only, with no modification, deletion, or execution of transactions.
Attacks that exploit this kind of access
Query Stacks transactions for an address with advanced filtering. It is categorised as a Read tool in the Bitcoin wallet MCP server MCP Server, which means it retrieves data without modifying state.
Register the Bitcoin wallet MCP server MCP server in PolicyLayer and add a rule for stx_query_transactions: 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 Bitcoin wallet MCP server. Nothing to install.
stx_query_transactions 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 stx_query_transactions 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 stx_query_transactions. 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.
stx_query_transactions is provided by the Bitcoin wallet MCP server MCP server (markmhendrickson/mcp-server-bitcoin). 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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