Get budget information from Monarch Money. Args: start_date: Start date in YYYY-MM-DD format (defaults to last month) end_date: End date in YYYY-MM-DD format (defaults to next month) Returns: List of budgets with amounts, spent, and remaining for each category.
AI agents call get_budgets to retrieve information from Monarch without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves existing budget data without side effects. It queries financial information but does not move money, modify transactions, execute code, or alter data. The parameters are read-only filters (date ranges). Classification as Read is appropriate with low severity since unauthorized budget information access has limited blast radius compared to tools that create, categorize, or delete transactions.
From the tool's definition Tool description states 'Get budget information from Monarch Money' and returns 'List of budgets with amounts, spent, and remaining for each category' with no modification, deletion, or execution capabilities.
Documented attack patterns abuse exactly the kind of access get_budgets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Monarch, and nothing reaches the server without passing your rules. This is the rule we recommend for get_budgets:
{
"version": "1",
"default": "deny",
"tools": {
"get_budgets": {}
}
}get_budgets is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get budget information from Monarch Money. Args: start_date: Start date in YYYY-MM-DD format (defaults to last month) end_date: End date in YYYY-MM-DD format (defaults to next month) Returns: List of budgets with amounts, spent, and remaining for each category. It is categorised as a Read tool in the Monarch MCP Server, which means it retrieves data without modifying state.
Register the Monarch MCP server in PolicyLayer and add a rule for get_budgets: 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. Nothing to install.
get_budgets 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_budgets 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_budgets. 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_budgets is provided by the Monarch MCP server (robcerda/monarch-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 50 Monarch tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
50 Monarch tools catalogued and risk-classified — across an index of 42,500+ MCP servers.