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georgebashi

lunchmoney-mcp

by georgebashi

get_all_categories

Read-only

Retrieve all categories from a user's Lunch Money account, with options for flattened or nested formatting and filtering by category groups.

Instructions

Get a list of all categories associated with the user's account. Returns categories in alphabetical order.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
formatNoIf `flattened`, returns a singular array of categories. If `nested`, returns top-level categories (either category groups or categories not part of a category group) in an array, with subcategories nested within the category group under the property children. Defaults to flattened.
is_groupNoIf true, returns only category groups. If false, returns only categories that are not category groups.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv3.0.0

TDQS

A4/5.0
Behavior4/5

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

The readOnlyHint annotation already signals safety, and the description adds useful behavioral context: results are scoped to the user's account and returned in alphabetical order. It does not contradict the annotation.

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?

Two short sentences with no filler. The main action and resource are front-loaded, and the sorting behavior is added in a single extra clause.

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

Completeness4/5

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

For a read-only list tool with fully documented optional parameters, the description is nearly complete. It covers scope and sort order; the only minor gap is not explicitly mentioning category groups, but the is_group parameter description fills that in.

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

Parameters3/5

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

Schema description coverage is 100%, so the format and is_group parameters are fully documented in the schema. The description adds no parameter-level meaning, so the baseline score applies.

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 states a specific verb and resource: 'Get a list of all categories associated with the user's account.' It also adds a meaningful detail, alphabetical ordering, and clearly distinguishes itself from single-category or tag tools.

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?

The listing use case is implied by 'all categories,' but the description gives no explicit guidance about when to choose this over get_single_category or the category CRUD siblings. No alternatives or exclusions are named.

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