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kud

mcp-lastfm

by kud

get_user_weekly_chart_list

Retrieve the available weekly chart date ranges for a Last.fm user to select a specific week for chart data.

Instructions

Get the list of available weekly chart date ranges for a user

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
userNoLast.fm username; defaults to MCP_LASTFM_USERNAME when set, so it can be omitted for your own account
Behavior2/5

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

No annotations are provided, so the description carries full burden. It omits behavioral traits such as authentication requirements, rate limits, or that it is a read operation. For a simple tool, this is a minimal disclosure.

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 sentence that directly states the tool's purpose with no extraneous words. Perfectly concise and front-loaded.

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?

Given the tool's simplicity (1 optional param, no output schema) and the context of sibling tools, the description is adequate. It hints at output structure ('list of available weekly chart date ranges'), which is sufficient for the agent to understand its role.

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 coverage is 100%, with the 'user' parameter described in the schema. The description adds no further value beyond the schema's description, so the baseline score of 3 is appropriate.

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 clearly states the action 'Get' and the resource 'list of available weekly chart date ranges for a user'. It effectively distinguishes this tool from siblings like get_user_weekly_album_chart, which retrieve actual chart data, by focusing on listing date ranges.

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?

While the description implies usage before fetching weekly charts, it lacks explicit guidance on when to use this tool versus alternatives (e.g., get_tag_weekly_chart_list). No when-not-to-use or prerequisites are mentioned.

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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