Get a summary of the budget, optionally for a specific month.
AI agents call get_budget_summary to retrieve information from YNAB MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves and queries budget summary data without creating, modifying, deleting, executing code, or moving money. It is a read-only operation that returns information for display or analysis purposes.
From the tool's definition Tool name 'get_budget_summary' and description 'Get a summary of the budget, optionally for a specific month' indicate a retrieval operation with no modification or execution of side effects.
Attacks that exploit this kind of access
Get a summary of the budget, optionally for a specific month. It is categorised as a Read tool in the YNAB MCP Server MCP Server, which means it retrieves data without modifying state.
Register the YNAB MCP Server MCP server in PolicyLayer and add a rule for get_budget_summary: 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 YNAB MCP Server. Nothing to install.
get_budget_summary 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_budget_summary 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_budget_summary. 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_budget_summary is provided by the YNAB MCP Server MCP server (ntdef/ynab-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.
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