Fetch transactions with optional filtering
AI agents call get_transactions to retrieve information from Monarch Money 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 transaction data from Monarch Money accounts without altering, deleting, or creating any records. The 'Fetch' action and optional filtering are hallmarks of a read-only query operation. While the data accessed may be financial in nature, the tool itself performs no financial operations (no payments, transfers, or financial commitments).
From the tool's definition Tool name 'get_transactions' and description 'Fetch transactions with optional filtering' indicate data retrieval with no modification.
Attacks that exploit this kind of access
Fetch transactions with optional filtering. It is categorised as a Read tool in the Monarch Money MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Monarch Money MCP Server MCP server in PolicyLayer and add a rule for get_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 Monarch Money MCP Server. Nothing to install.
get_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 get_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 get_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.
get_transactions is provided by the Monarch Money MCP Server MCP server (randallt21/monarch-money-mcp). 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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