Retrieve all budgets for the authenticated user.
AI agents call get_budgets 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 is a straightforward query operation that fetches existing budget data. It has no side effects—no data is created, modified, deleted, or used to trigger external operations. The user's financial data remains unchanged. While the sensitivity of the data (personal finance information) is notable, the tool itself performs only a read operation with minimal blast radius.
From the tool's definition Tool name 'get_budgets' and description 'Retrieve all budgets for the authenticated user' clearly indicate a retrieval operation with no modification or deletion of data.
Attacks that exploit this kind of access
Retrieve all budgets for the authenticated user. 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_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 YNAB MCP Server. 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 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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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