Sort query results by any columns with support for custom enum ordering. Uses schema metadata for enum orders when available.
AI agents call sort_parquet to retrieve information from Parquet MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Sorting is a read-only operation that organizes query results for presentation. It does not create, modify, or delete data; it does not execute external commands or trigger side effects. While the server overall supports CRUD operations (write, delete, modify), this specific tool is limited to non-destructive retrieval with ordering, placing it firmly in the Read category with low severity.
From the tool's definition Tool name 'sort_parquet' and description state it 'Sort query results' — a retrieval operation that reorders existing data without modification, deletion, or execution of arbitrary code.
Attacks that exploit this kind of access
Sort query results by any columns with support for custom enum ordering. Uses schema metadata for enum orders when available. It is categorised as a Read tool in the Parquet MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Parquet MCP Server MCP server in PolicyLayer and add a rule for sort_parquet: 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 Parquet MCP Server. Nothing to install.
sort_parquet 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 sort_parquet 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 sort_parquet. 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.
sort_parquet is provided by the Parquet MCP Server MCP server (markmhendrickson/mcp-server-parquet). 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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