group_aggregate
AI agents call group_aggregate to retrieve information from MCP Tabular Data Analysis Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Group aggregation (groupby + aggregation) is a standard read-only analytical operation that summarizes data without modifying, deleting, or executing external code. The tool description is empty, but context from sibling tools and server purpose indicates this performs statistical aggregation. No side effects or irreversible actions are expected.
From the tool's definition Tool name 'group_aggregate' and sibling tools on server (analyze_time_series, compute_correlation, create_pivot_table, describe_dataset, detect_anomalies, generate_chart, data_quality_report) are all read-only analysis operations.
Attacks that exploit this kind of access
group_aggregate. It is categorised as a Read tool in the MCP Tabular Data Analysis Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Tabular Data Analysis Server MCP server in PolicyLayer and add a rule for group_aggregate: 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 MCP Tabular Data Analysis Server. Nothing to install.
group_aggregate 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 group_aggregate 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 group_aggregate. 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.
group_aggregate is provided by the MCP Tabular Data Analysis Server MCP server (k02d/mcp-tabular). 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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