get_transactions
AI agents call get_transactions 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 queries and retrieves existing transaction data from a user's YNAB budget. It has no side effects, does not modify or delete data, and does not execute code or move money. It is a straightforward data retrieval operation with minimal security risk if misused by an AI agent—the worst case being unnecessary API calls or information disclosure of the user's own financial data.
From the tool's definition Tool name 'get_transactions' and context indicating it retrieves transaction data from YNAB. The description is empty, but the naming pattern matches sibling read tools (get_accounts, get_budget_summary, get_budgets, get_categories) which retrieve data…
Attacks that exploit this kind of access
get_transactions. 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_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 YNAB 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 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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