AI agents call query_table_rows to retrieve information from N8n without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data from an existing data table with no side effects. It supports read-only operations (filtering, sorting, searching) that do not modify, delete, or execute anything. The blast radius of misuse is minimal—an agent could only access existing data it queries, which is a standard Read operation.
From the tool's definition Tool description states it 'Query rows from a data table' with optional 'filtering, sorting, and full-text search'. The verb 'query' and the phrase 'from a data table' indicate data retrieval without modification.
Attacks that exploit this kind of access
Query rows from a data table with optional filtering, sorting, and full-text search. It is categorised as a Read tool in the N8n MCP Server, which means it retrieves data without modifying state.
Register the N8n MCP server in PolicyLayer and add a rule for query_table_rows: 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 N8n. Nothing to install.
query_table_rows 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 query_table_rows 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 query_table_rows. 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.
query_table_rows is provided by the N8n MCP server (siddharth0903/n8n-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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