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Local YDB MCP

by astandrik
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TypeScript
Local

local_ydb_database_status

Read-onlyIdempotent

Retrieve YDB database status for a configured tenant path, returning command output and ok flag to verify tenant state before bootstrap or restart troubleshooting.

Instructions

Read-only YDB admin database status for the configured tenant path. Returns the command, stdout, stderr, and ok flag; use this for tenant state before bootstrap/restart troubleshooting, and use local_ydb_tenant_check for scheme reachability.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
profileNoNamed profile from local-ydb.config.json. Defaults to config.defaultProfile.
configPathNoAbsolute path to an explicit local-ydb config file. Missing, unreadable, oversized, or invalid explicit files fail closed instead of using defaults.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv0.1.21
    • changedInput schema / properties / configPath / description
      Previous value: -"Explicit local-ydb config file path to load for this tool call. Useful when the MCP server should pick up a different config without restart."New value: +"Absolute path to an explicit local-ydb config file. Missing, unreadable, oversized, or invalid explicit files fail closed instead of using defaults."
    • addedInput schema / properties / configPath / minLength
      Added value: +1
  2. Addedv0.1.13
  3. Removedv0.1.12
  4. Addedv0.1.5
  5. Removedv0.1.4
  6. First observedv0.1.0

TDQS

A4.5/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description reinforces the read-only nature and, more usefully, discloses the exact output fields returned (command, stdout, stderr, ok flag), which is important because there is no output schema. It clearly describes the tool's observable behavior without contradicting annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single, dense sentence that front-loads the core behavior, then states the return fields and usage context, then names the alternative tool. Every clause earns its place with zero filler.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The definition is complete for a simple read-only status tool: it explains what the command returns, when to use it, and how it differs from the most likely sibling. Since there are no required parameters and the schema covers both optional ones, nothing essential is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so both profile and configPath are already fully documented in the input schema. The description adds no param-level semantics, which is acceptable given the high schema coverage; the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description states exactly what the tool does: read-only YDB admin database status for a configured tenant path. It also identifies the return payload (command, stdout, stderr, ok flag) and differentiates itself from local_ydb_tenant_check, making sibling selection unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly tells the agent when to use this tool ('before bootstrap/restart troubleshooting') and which alternative to use instead ('local_ydb_tenant_check for scheme reachability'). This is direct, actionable routing guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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