# mysql_stats_distinct

Get distinct values from a column with count. Useful for understanding cardinality and unique value distribution.

Agent View of the PolicyLayer registry record for `mysql_stats_distinct`. HTML page: https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-stats-distinct

## Facts

- Tool: `mysql_stats_distinct`
- Server: Mysql Mcp (`oci:docker.io/writenotenow/mysql-mcp:v1.0.0`) — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp.md
- Homepage: https://github.com/neverinfamous/mysql-mcp.git
- 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": "mysql_stats_distinct",
    "arguments": {}
  }
}
```

## Why mysql_stats_distinct is rated Low

This is a SELECT-based analytical query that retrieves distinct values and their counts from a database column. It has no side effects, cannot modify data, and poses minimal security risk beyond potential information disclosure if applied to sensitive columns. Classified as Read with low severity.

From the tool's own definition: "Tool performs 'Get distinct values from a column with count', which queries data without modifying, deleting, or executing external operations. The description explicitly targets data retrieval ('understanding cardinality and unique value distribution')."

## Use case

AI agents call mysql_stats_distinct to retrieve information from Mysql Mcp 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 Mysql Mcp:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "mysql_stats_distinct": {}
  }
}
```

## Other tools on Mysql Mcp (222)

- `mysql_audit_restore_backup` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-audit-restore-backup.md
- `mysql_cascade_simulator` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-cascade-simulator.md
- `mysql_doc_drop_collection` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-doc-drop-collection.md
- `mysql_doc_remove` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-doc-remove.md
- `mysql_drop_partition` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-drop-partition.md
- `mysql_drop_schema` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-drop-schema.md
- `mysql_drop_table` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-drop-table.md
- `mysql_drop_view` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-drop-view.md
- `mysql_event_drop` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-event-drop.md
- `mysql_force_index` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-force-index.md
- `mysql_fulltext_drop` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-fulltext-drop.md
- `mysql_json_remove` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-json-remove.md
- `mysql_migration_rollback` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-migration-rollback.md
- `mysql_role_drop` — Destructive — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-role-drop.md
- `mysql_analyze_table` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-analyze-table.md
- `mysql_create_dump` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-create-dump.md
- `mysql_event_create` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-event-create.md
- `mysql_flush_tables` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-flush-tables.md
- `mysql_json_merge` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-json-merge.md
- `mysql_migration_apply` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-migration-apply.md
- `mysql_optimize_table` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-optimize-table.md
- `mysql_spatial_intersection` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-spatial-intersection.md
- `mysql_spatial_transform` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-spatial-transform.md
- `mysql_stats_row_number` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-stats-row-number.md
- `mysql_transaction_begin` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-transaction-begin.md
- `mysql_transaction_execute` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-transaction-execute.md
- `mysqlsh_run_script` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysqlsh-run-script.md
- `proxysql_commands` — Execute — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/proxysql-commands.md
- `mysql_audit_diff_backup` — Read — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-audit-diff-backup.md
- `mysql_audit_list_backups` — Read — https://policylayer.com/tools/io-github-neverinfamous-mysql-mcp/mysql-audit-list-backups.md
- …and 192 more: https://policylayer.com/tools/io-github-neverinfamous-mysql-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`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-neverinfamous-mysql-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-neverinfamous-mysql-mcp