# local_ydb_graphshard_check

Read-only GraphShard check through viewer/json capabilities and tabletinfo for the configured tenant. Returns graphShardExists, tablet ids, and viewer status details; use after tenant bootstrap when GraphShard support or tablet visibility is the specific question.

Agent View of the PolicyLayer registry record for `local_ydb_graphshard_check`. HTML page: https://policylayer.com/tools/local-ydb/local-ydb-graphshard-check

## Facts

- Tool: `local_ydb_graphshard_check`
- 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: 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": "local_ydb_graphshard_check",
    "arguments": {}
  }
}
```

## Why local_ydb_graphshard_check is rated Low

This tool retrieves and queries data about GraphShard status and tablet information without creating, modifying, deleting, or executing operations. It is purely informational in nature, making it a Read category tool with low severity since misuse would only result in information disclosure with minimal blast radius.

From the tool's own definition: "Tool description explicitly states 'Read-only GraphShard check' and describes retrieval of status information: 'Returns graphShardExists, tablet ids, and viewer status details'. No modification, deletion, or execution of commands."

## Use case

AI agents call local_ydb_graphshard_check to retrieve information from Local Ydb 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 Local Ydb:

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

## 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_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
- `local_ydb_add_storage_groups` — Write — https://policylayer.com/tools/local-ydb/local-ydb-add-storage-groups.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`

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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