pixelart_set_tile

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

Annotations indicate readOnlyHint=false (modifies), destructiveHint=false, idempotentHint=true. The description confirms it places a canvas, which aligns with modifications. However, it does not disclose behavior on overwriting existing slots, empty canvas, or error conditions. No contradiction with 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 concise with a clear purpose line followed by an Args/Returns block. It avoids fluff but could benefit from slightly more structure (e.g., bullet points for args).

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 parameter count is 1 (a single params object) and an output schema exists (confirmation string), the description provides minimal context. It does not explain side effects, error handling, or relationship with other tileset tools. Adequate but not comprehensive.

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?

Schema description coverage is 0% (top-level param lacks description; nested params have descriptions but overall coverage is low). The description lists parameter names but adds no semantic value beyond the schema. For example, it does not explain the row-major indexing or what 'canvas_id' refers to in more detail.

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 action ('Place a drawn canvas into a tileset slot') with a specific verb ('Place') and resource context (canvas into tileset slot). It distinguishes from sibling tools like pixelart_create_tileset (creation) and pixelart_export_tileset (export).

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?

No guidance on when to use this tool versus alternatives. It does not mention prerequisites (e.g., need an existing tileset and canvas) or scenarios where this tool is appropriate. Sibling tools like pixelart_create_tileset or pixelart_delete_tileset exist but no comparison is given.

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