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PVsyst CLI MCP

PVsyst CLI MCP

pvsyst_get_variant_components

Reads a variant's component references and current SHA-256 hash so you can verify state before guarded edits.

Instructions

[Projects & Variants] Read component references in a variant and its current SHA-256 for guarded edits.

Input Schema

NameRequiredDescriptionDefault
projectYes
variantYes

Schema Changelog

Changes observed during successful MCP inspections.

  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?

No annotations, so the description carries the burden; it does disclose the read nature and that the payload includes a SHA-256 for optimistic concurrency, which is genuinely useful. It omits failure behavior (e.g., what happens if the variant is missing or the hash is stale) and permission requirements.

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

Conciseness4/5

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

A single front-loaded sentence with a category tag and no filler; the purpose lands immediately. Slightly terse given the schema gaps, but nothing is wasted.

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 two-parameter read with no output schema and no annotations, the description covers what is returned at a high level (component refs plus hash) but leaves parameter semantics and error behavior unaddressed. Adequate but with visible gaps.

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 coverage is 0% and the description says nothing about the two parameters. 'project' and 'variant' are self-explanatory identifiers, but there is no indication of accepted formats, whether names or IDs are expected, or whether project must already be open.

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

Purpose4/5

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

States a specific verb (Read) and resource (component references in a variant) plus a concrete return element (current SHA-256). This is distinguishable from pvsyst_get_variant_parameters and pvsyst_update_variant_components, though the description never explicitly names those siblings.

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

Usage Guidelines3/5

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

'for guarded edits' implies the usage context — fetch the hash before mutating so an edit can be validated — but the description never states when to call it versus alternatives or what the guard precondition is. Usage is inferred rather than spelled out.

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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