Get Light Level At Coordinates

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

Annotations already declare the tool as read-only, open-world, idempotent, and non-destructive. The description adds value by specifying the return format (light and skyLight ranges 0-15) and the mob spawn rule, enhancing behavioral understanding beyond annotations.

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 compact and well-structured, leading with the core function, then adding a practical use case and return format snippet. Every sentence earns its place with no unnecessary fluff.

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?

For a simple read-only tool with three numeric coordinates, the description effectively covers the purpose, return structure, and a relevant rule. The only noticeable omission is explicit parameter definitions, but the Minecraft context makes the coordinates fairly clear.

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?

The input schema has 0% description coverage, and the description does not explicitly define x, y, and z. It only implies they are block coordinates through the phrase 'at a block' and the echoed output. This is a significant gap for an agent that needs precise parameter semantics.

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 states 'Returns light levels at a block' with a specific resource and action. It clearly distinguishes from siblings like minecraft_get_block_at and minecraft_get_biome_at by focusing solely on light levels.

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?

The description gives a clear use case: 'useful for checking if an area is safe from mob spawns'. This provides context on when to use the tool, though it does not explicitly name alternatives or exclusions.

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