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ScratchJr Desktop MCP Server

scratchjr_backup

Save your current ScratchJr project work and generate a full timestamped database backup to prevent data loss.

Instructions

Save current work and make a full timestamped database backup.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

A4.1/5.0
Behavior4/5

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

Annotations only indicate non-read-only, non-destructive behavior. The description adds useful context by stating that it saves current work and creates a full timestamped database backup, implying persistence and uniqueness. It does not detail backup location or completion behavior, but for a zero-parameter tool this is reasonably transparent.

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, compact sentence conveys the full action without filler. Both clauses—'save current work' and 'make a full timestamped database backup'—contribute meaningful information.

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?

For a zero-parameter action with no output schema, the description fully covers what the tool does and the scope of its effect. No additional context is needed for an agent to invoke it correctly.

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

Parameters4/5

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

The tool has zero parameters, so the schema provides full coverage by definition. The baseline of 4 applies because there are no parameter semantics to explain.

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?

The description uses concrete verbs ('Save', 'make') and a specific resource ('full timestamped database backup'). It is clearly distinct from siblings like scratchjr_save_project or scratchjr_export_project by emphasizing a full database backup rather than a single project.

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?

The description gives no guidance on when to use this tool instead of alternatives such as scratchjr_save_project or scratchjr_export_project. It does not mention preconditions, recommended timing, or situations where a backup is necessary.

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