PoE2 Meta Build Overview

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

Annotations already cover read-only, open-world, idempotent, and non-destructive traits, so the description adds value by specifying the data source (poe.ninja) and the type of statistics (percentage share, trend direction), but doesn't detail behavioral aspects like rate limits, authentication needs, or data freshness.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is well-structured and front-loaded with the core purpose, followed by concise sections for arguments, returns, and examples. Every sentence adds value without redundancy, making it efficient and easy to parse.

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

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

Given the tool's low complexity, rich annotations, and full schema coverage, the description is mostly complete. However, the lack of an output schema means it should ideally detail return values more explicitly, though it mentions 'percentages and trend indicators' which provides some context.

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

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

With 100% schema description coverage, the schema fully documents the two parameters. The description adds minimal semantics by mentioning filtering examples and default usage, but doesn't provide additional meaning beyond what the schema already specifies, such as valid league names or class options.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the specific action ('Get class distribution statistics') and resource ('Path of Exile 2 from poe.ninja'), distinguishing it from sibling tools like currency or item tools by focusing on class meta data rather than economic or wiki information.

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

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

It provides explicit guidance on when to use the tool with examples ('What's the current meta?' and 'Most popular Witch builds?'), including when to apply the optional filter parameter, though it doesn't explicitly state when not to use it versus alternatives like sibling tools.

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