# aggregate_column_tool Compute aggregate statistics (min, max, mean, etc.) on a Parquet column. Agent View of the PolicyLayer registry record for `aggregate_column_tool`. HTML page: https://policylayer.com/tools/io-github-iowarp-adios-mcp/aggregate-column-tool ## Facts - Tool: `aggregate_column_tool` - Server: CLIO Adios (`pypi:clio-kit`) — https://policylayer.com/tools/io-github-iowarp-adios-mcp.md - Install: `npx -y pypi:clio-kit` - Homepage: https://github.com/iowarp/clio-kit - Risk category: Read (Low risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Allowed ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "aggregate_column_tool", "arguments": {} } } ``` ## Why aggregate_column_tool is rated Low This tool retrieves and analyzes existing data from a Parquet column to produce statistical summaries. It has no side effects—it does not create, modify, delete, or execute code. The operation is purely computational analysis of data that already exists, which is characteristic of Read-category tools. From the tool's own definition: "Tool description states 'Compute aggregate statistics (min, max, mean, etc.) on a Parquet column.' The verb 'compute' combined with 'aggregate statistics' indicates read-only querying of data without modification, deletion, or execution of arbitrary code." ## Use case AI agents call aggregate_column_tool to retrieve information from CLIO Adios without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere. ## Recommended policy (PolicyLayer) Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches CLIO Adios: ```json { "version": "1", "default": "deny", "tools": { "aggregate_column_tool": {} } } ``` ## Other tools on CLIO Adios (203) - `cancel_slurm_job` — Destructive — https://policylayer.com/tools/io-github-iowarp-adios-mcp/cancel-slurm-job.md - `destroy_pipeline` — Destructive — https://policylayer.com/tools/io-github-iowarp-adios-mcp/destroy-pipeline.md - `jm_remove_repo` — Destructive — https://policylayer.com/tools/io-github-iowarp-adios-mcp/jm-remove-repo.md - `jm_reset` — Destructive — https://policylayer.com/tools/io-github-iowarp-adios-mcp/jm-reset.md - `remove_pkg` — Destructive — https://policylayer.com/tools/io-github-iowarp-adios-mcp/remove-pkg.md - `slurm_cancel` — Destructive — https://policylayer.com/tools/io-github-iowarp-adios-mcp/slurm-cancel.md - `allocate_slurm_nodes` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/allocate-slurm-nodes.md - `build_pipeline_env` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/build-pipeline-env.md - `generate_isosurface` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/generate-isosurface.md - `heatmap_plot` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/heatmap-plot.md - `hypothesis_testing` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/hypothesis-testing.md - `jarvis_run` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/jarvis-run.md - `jm_cd` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/jm-cd.md - `jm_graph_build` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/jm-graph-build.md - `module_load` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/module-load.md - `module_swap` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/module-swap.md - `module_unload` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/module-unload.md - `parallel_sort_large_file` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/parallel-sort-large-file.md - `reset_camera` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/reset-camera.md - `rotate_camera` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/rotate-camera.md - `run_pipeline` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/run-pipeline.md - `show_screenshot_preview` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/show-screenshot-preview.md - `stop_chronolog` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/stop-chronolog.md - `submit_array_job` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/submit-array-job.md - `submit_slurm_job` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/submit-slurm-job.md - `warp_by_vector` — Execute — https://policylayer.com/tools/io-github-iowarp-adios-mcp/warp-by-vector.md - `analyze_file_access_patterns` — Read — https://policylayer.com/tools/io-github-iowarp-adios-mcp/analyze-file-access-patterns.md - `analyze_log_statistics` — Read — https://policylayer.com/tools/io-github-iowarp-adios-mcp/analyze-log-statistics.md - `analyze_mpiio_operations` — Read — https://policylayer.com/tools/io-github-iowarp-adios-mcp/analyze-mpiio-operations.md - `analyze_posix_operations` — Read — https://policylayer.com/tools/io-github-iowarp-adios-mcp/analyze-posix-operations.md - …and 173 more: https://policylayer.com/tools/io-github-iowarp-adios-mcp.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-iowarp-adios-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-iowarp-adios-mcp