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jhmorimoto

Kubernetes Read-Only MCP

by jhmorimoto

list_deployments

Read-only

List Kubernetes Deployments and check replica readiness in a specified cluster and optional namespace to diagnose workload health.

Instructions

List Deployments and replica readiness.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
clusterYes
namespaceNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. First observedv0.1.0

TDQS

B3.2/5.0
Behavior3/5

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

Annotations already mark readOnlyHint=true, and the description's 'List' is consistent with that. It adds the useful 'replica readiness' detail, but doesn't cover pagination, error behavior, permission needs, or namespace semantics. No annotation contradiction.

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?

The entire description is a single front-loaded sentence with no filler. Every word adds value.

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

Completeness3/5

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

For a simple read-only list tool with an output schema, the description covers the core purpose. However, missing parameter semantics and usage guidance leave ambiguity about the required cluster parameter and how namespace filtering behaves.

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

Parameters1/5

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

Schema description coverage is 0%, and the description does not explain either 'cluster' or 'namespace' beyond their raw names. The description fails to compensate for the low schema coverage.

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 uses a specific verb ('List') and resource ('Deployments'), and adds 'replica readiness' as a distinguishing aspect. It clearly differentiates from sibling list tools by naming a concrete resource type.

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?

No explicit guidance on when to use this tool versus alternatives such as list_resources or list_statefulsets. There are no stated conditions, exclusions, or preferred scenarios.

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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