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Rubio-Enterprises

grocy-mcp

Equipment Update Tool

equipment_update_tool

Update equipment item details such as name, description, and battery assignment in Grocy household management.

Instructions

Update an equipment item.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNo
equipmentYes
battery_idNo
descriptionNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.2.0

TDQS

D1.9/5.0
Behavior1/5

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

With no annotations provided, the description carries the full burden of disclosing behavioral traits. It only says 'Update', implying mutation, but does not describe side effects, reversibility, required permissions, or response behavior. For an update operation, this is severely lacking.

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

Conciseness2/5

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

The description is a single sentence, which is concise, but it is under-specified rather than appropriately sized. It fails to include essential information about parameters or usage, so the brevity is a drawback, not a virtue.

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

Completeness1/5

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

Given four parameters, no annotations, no schema descriptions, and no usage guidance, the description is completely inadequate. The agent cannot correctly invoke this tool without additional information from other sources.

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%, meaning the input schema provides no descriptions for the four parameters. The description mentions none of them, so it adds zero meaning beyond the raw schema. The agent gets no help understanding what 'name', 'battery_id', or 'description' mean or how to use them.

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?

The description states a clear verb ('Update') and resource ('an equipment item'), which identifies the tool's basic function. However, it does not distinguish itself from sibling tools like equipment_create_tool or equipment_details_tool, nor does it mention what fields can be updated, so it is slightly above minimal but lacks differentiation.

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

Usage Guidelines1/5

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

There is no guidance on when to use this tool versus alternatives, no mention of prerequisites, and no exclusion criteria. The description is entirely silent on usage context, leaving the agent to guess when this tool is appropriate.

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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