# local_ydb_write_dynamic_auth_config

Write the text-proto dynamic-node auth token file needed for mandatory-auth startup. Use after choosing the SID for auth hardening; without confirm=true this returns the planned file write only.

Agent View of the PolicyLayer registry record for `local_ydb_write_dynamic_auth_config`. HTML page: https://policylayer.com/tools/local-ydb/local-ydb-write-dynamic-auth-config

## Facts

- Tool: `local_ydb_write_dynamic_auth_config`
- Server: Local Ydb (`@astandrik/local-ydb-mcp`) — https://policylayer.com/tools/local-ydb.md
- Install: `npx -y @astandrik/local-ydb-mcp`
- Homepage: git+https://github.com/astandrik/local-ydb-toolkit.git
- 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": "local_ydb_write_dynamic_auth_config",
    "arguments": {}
  }
}
```

## Why local_ydb_write_dynamic_auth_config is rated Medium

This tool modifies authentication configuration files on the local YDB deployment system. While reversible (files can be edited or overwritten), writing auth token files affects system security posture and access control. The tool's primary function is to create/modify data (auth token file) rather than delete it or execute arbitrary code, placing it in Write category.

From the tool's own definition: "Tool description explicitly states 'Write the text-proto dynamic-node auth token file' and 'returns the planned file write only' without confirmation."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Local Ydb (37)

- `local_ydb_cleanup_storage` — Destructive — https://policylayer.com/tools/local-ydb/local-ydb-cleanup-storage.md
- `local_ydb_destroy_stack` — Destructive — https://policylayer.com/tools/local-ydb/local-ydb-destroy-stack.md
- `local_ydb_remove_dynamic_nodes` — Destructive — https://policylayer.com/tools/local-ydb/local-ydb-remove-dynamic-nodes.md
- `local_ydb_add_dynamic_nodes` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-add-dynamic-nodes.md
- `local_ydb_apply_auth_hardening` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-apply-auth-hardening.md
- `local_ydb_bootstrap` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-bootstrap.md
- `local_ydb_bootstrap_root_database` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-bootstrap-root-database.md
- `local_ydb_check_prerequisites` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-check-prerequisites.md
- `local_ydb_pull_image` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-pull-image.md
- `local_ydb_restart_stack` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-restart-stack.md
- `local_ydb_start_dynamic_node` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-start-dynamic-node.md
- `local_ydb_upgrade_version` — Execute — https://policylayer.com/tools/local-ydb/local-ydb-upgrade-version.md
- `local_ydb_auth_check` — Read — https://policylayer.com/tools/local-ydb/local-ydb-auth-check.md
- `local_ydb_container_logs` — Read — https://policylayer.com/tools/local-ydb/local-ydb-container-logs.md
- `local_ydb_database_status` — Read — https://policylayer.com/tools/local-ydb/local-ydb-database-status.md
- `local_ydb_dump_tenant` — Read — https://policylayer.com/tools/local-ydb/local-ydb-dump-tenant.md
- `local_ydb_generate_schema` — Read — https://policylayer.com/tools/local-ydb/local-ydb-generate-schema.md
- `local_ydb_graphshard_check` — Read — https://policylayer.com/tools/local-ydb/local-ydb-graphshard-check.md
- `local_ydb_healthcheck` — Read — https://policylayer.com/tools/local-ydb/local-ydb-healthcheck.md
- `local_ydb_inventory` — Read — https://policylayer.com/tools/local-ydb/local-ydb-inventory.md
- `local_ydb_list_dumps` — Read — https://policylayer.com/tools/local-ydb/local-ydb-list-dumps.md
- `local_ydb_list_versions` — Read — https://policylayer.com/tools/local-ydb/local-ydb-list-versions.md
- `local_ydb_nodes_check` — Read — https://policylayer.com/tools/local-ydb/local-ydb-nodes-check.md
- `local_ydb_pull_status` — Read — https://policylayer.com/tools/local-ydb/local-ydb-pull-status.md
- `local_ydb_reduce_storage_groups` — Read — https://policylayer.com/tools/local-ydb/local-ydb-reduce-storage-groups.md
- `local_ydb_scheme` — Read — https://policylayer.com/tools/local-ydb/local-ydb-scheme.md
- `local_ydb_status_report` — Read — https://policylayer.com/tools/local-ydb/local-ydb-status-report.md
- `local_ydb_storage_leftovers` — Read — https://policylayer.com/tools/local-ydb/local-ydb-storage-leftovers.md
- `local_ydb_storage_placement` — Read — https://policylayer.com/tools/local-ydb/local-ydb-storage-placement.md
- `local_ydb_tenant_check` — Read — https://policylayer.com/tools/local-ydb/local-ydb-tenant-check.md
- …and 7 more: https://policylayer.com/tools/local-ydb.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=local-ydb · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/local-ydb