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amazing-marvin-complete-mcp

amazing-marvin-complete-mcp

by andreasd083
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Hybrid

get_categories

Read-only

Retrieve the full hierarchy of categories and projects with IDs and parent IDs to locate the correct parent when creating or moving items.

Instructions

Get all categories and projects as a hierarchy with id and parentId. Get all categories and projects (the whole hierarchy; parentId='root' is the top level). Use to find the right parent_id when creating/moving.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "get_categories"
  }
}

Input Schema

NameRequiredDescriptionDefault

No arguments

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.3.0

TDQS

A4/5.0
Behavior4/5

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

Annotations already mark this as read-only, and the description adds useful behavioral context: it returns the entire hierarchy, uses parentId='root' for the top level, and is meant for locating parent IDs. This goes beyond the annotations without contradicting them.

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 description is somewhat repetitive: 'Get all categories and projects' appears twice in nearly identical form. It could be condensed into one clear sentence plus the usage note. Still, the key information is front-loaded and the usage hint adds value.

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, read-only tool with an output schema present, the description is complete. It explains the hierarchy, the root convention, and the intended use, so an agent has enough to call it correctly and interpret the result.

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 baseline is 4. The description does not need to explain parameter semantics and correctly focuses on the return structure and usage purpose.

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 clearly identifies the resource (all categories and projects) and the operation (get as hierarchy with id and parentId). It is unambiguous and distinct from sibling tools like get_children or get_labels, though it does not explicitly name alternatives.

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

Usage Guidelines4/5

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

The description explicitly states a concrete use case: 'Use to find the right parent_id when creating/moving.' It gives clear context for when to call the tool, though it does not specify when not to use it or mention alternatives.

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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