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Read member health, role and replica lag

cluster_members_list
Read-onlyIdempotent

Read member health, role, and replica lag for a database cluster to diagnose replication issues and verify node status.

Instructions

Read member health, role and replica lag

Input Schema

NameRequiredDescriptionDefault
clusterYes
namespaceNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.4.3

TDQS

C2.1/5.0
Behavior2/5

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered externally. Beyond that, the description says nothing about whether results cover all members or a filtered subset, whether the output is a snapshot in time, or how replica lag is measured, leaving the behavioral burden on the schema.

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

Conciseness3/5

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

The text is a single short fragment with no waste, but its brevity comes from omission rather than discipline; nothing is front-loaded about scope or filtering. It is not bloated, just under-specified.

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

Completeness2/5

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

The tool is simple (two parameters, no output schema), but a complete definition should still state that it lists members for the given cluster and what the optional namespace does. With zero annotation gaps covered by prose and no parameter explanation, an agent is missing scope-critical information.

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

Parameters2/5

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

Schema description coverage is reported at 0%, and the description adds no meaning for either parameter. The required 'cluster' argument is never mentioned, nor is whether 'namespace' narrows the member list, so the agent gets no help interpreting the inputs.

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

Purpose2/5

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

Tautological: description restates name/title.

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

Usage Guidelines2/5

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

There is no when-to-use guidance, no mention of when to prefer cluster_member_get for a single member, and no prerequisites such as needing the cluster name. The agent must infer everything about selection from the tool name alone.

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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