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thenavidm

Lemon Squeezy MCP Server

by thenavidm

List license key instances

list_license_key_instances
Read-onlyIdempotent

Fetch a paginated list of license key instances to review activations and filter by license key ID for license management.

Instructions

Returns a paginated list of license key instances.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pageNo
accountNoExact private profile label. Does not prove store ownership; mode applies to the main API key only.
includeNoComma-separated native relationships from pinned official SDK: license-key.
per_pageNoNative page size; default10, max100.
license_key_idNoExact native resource ID.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv2.0.0

TDQS

B3.2/5.0
Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds only that results are paginated, which is useful context over the annotations but stops well short of noting the optional filtering/expansion behavior.

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 sentence with no filler and the core operation front-loaded. It is efficient, though arguably under-specified rather than optimally concise.

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 list tool with no required parameters, annotations covering the safety profile, and no output schema, the description is minimally adequate. It omits what the instances look like, whether the list is scoped to a store or account by default, and how filters behave.

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 80%, so the schema documents most parameters (account, include, per_page, license_key_id) on its own. The description adds nothing beyond the word 'paginated' and does not compensate for the undocumented 'page' parameter, so the baseline 3 applies.

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 specific verb (returns a paginated list) and resource (license key instances), which distinguishes it from the singular get_license_key_instance sibling. However, it does not explicitly clarify its relationship to list_license_keys or get_license_key, leaving the boundary to inference.

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?

There is no when-to-use guidance, no mention of alternatives such as get_license_key_instance or list_license_keys, and no indication that results can be narrowed by license_key_id. An agent gets no help choosing between the sibling list/get tools.

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