set_cells

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

The description is purely functional and does not disclose behavioral traits such as overwriting behavior, whether it affects the saved scene, or if any conditions must be met. With all annotation hints set to false, the description carries the full burden but provides no additional transparency.

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 a single, clear sentence with no irrelevant content. It is concise and front-loaded, making it easy to understand at a glance.

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 moderate complexity (multiple parameters, nested cell definitions, and no output schema), the description is too sparse. It omits critical context such as whether existing cells are replaced, whether the change is saved to disk, or any side effects, leaving the agent under-informed.

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 100%, so all parameters are already well documented. The description adds no extra meaning to the parameters, maintaining the baseline score of 3.

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 tool sets tile cells on a TileMapLayer node, which is a specific verb and resource. It is distinct from sibling tools like get_tile_data or set_custom_tile_data, though it doesn't explicitly differentiate itself.

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 is provided on when to use this tool versus alternatives. It doesn't mention prerequisites, typical scenarios, or conditions under which this tool is preferred over related tools like set_custom_tile_data.

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