Query transactions that interacted with a specific smart contract.
AI agents call stx_query_transactions_by_contract 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 associated with a smart contract. It performs a read-only query operation that has no side effects, does not modify any blockchain state, does not execute code, and does not move funds. The query operation is purely informational and poses minimal risk if misused by an AI agent, as it cannot alter wallet state, execute transactions, or cause financial harm.
From the tool's definition Tool name contains 'query' and description states 'Query transactions' - a passive data retrieval operation with no modification, deletion, or execution of code.
Attacks that exploit this kind of access
Query transactions that interacted with a specific smart contract. 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_by_contract: 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_by_contract 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_by_contract 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_by_contract. 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_by_contract 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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