# merge_datasets

Join two datasets using inner, outer, left, or right joins on specified key columns.

Agent View of the PolicyLayer registry record for `merge_datasets`. HTML page: https://policylayer.com/tools/io-github-iowarp-adios-mcp/merge-datasets

## Facts

- Tool: `merge_datasets`
- 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: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "merge_datasets",
    "arguments": {}
  }
}
```

## Why merge_datasets is rated Medium

Merging/joining datasets is a write operation that creates or modifies data in a reversible manner. While the operation itself doesn't execute arbitrary code or delete data, it generates new derived data structures. The severity is medium because misuse could create incorrect analytical results or large intermediate datasets, but the operation is generally reversible (the joined result can be discarded).

From the tool's own definition: "Tool description states 'Join two datasets...on specified key columns', which performs a data transformation operation that creates new data structures (joined datasets) without permanently deleting or destructively modifying the original sources."

## Use case

AI agents use merge_datasets to create or update resources in CLIO Adios, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CLIO Adios environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches CLIO Adios:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "merge_datasets": {
      "limits": [
        {
          "counter": "merge_datasets_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## 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
- `aggregate_column_tool` — Read — https://policylayer.com/tools/io-github-iowarp-adios-mcp/aggregate-column-tool.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
- …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