set_tile

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

No annotations are provided, so the description must convey behavioral traits. It discloses that index 0 = empty (enables clearing) but does not mention overwriting behavior, out-of-bounds handling, the effect of the 'frame' parameter, or whether the tool requires a specific layer type. Conveys basic mutation but misses important nuances.

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?

A single, well-structured sentence that concisely states the operation. No redundancy, and all words add value. Ideal length for a straightforward tool.

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 6 parameters, no annotations, and no output schema, the description is insufficient. It does not explain the role of 'filename' and 'layer', nor the default 'frame'. Missing guidance on return value or error conditions. Relies heavily on parameter names which may be ambiguous.

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%, so the description must explain parameters. It covers 'tile_index', 'column', and 'row' but omits 'filename', 'layer', and 'frame'. 'filename' likely specifies the sprite file, 'layer' the target layer, and 'frame' defaults to 1—none are clarified, leaving ambiguity.

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 tile'), the resource ('by tileset index'), the location ('at grid cell (column, row)'), and even clarifies that index 0 means empty. It effectively distinguishes from siblings like 'set_tiles' (which sets multiple tiles) and 'add_tile' (which likely adds to a tilemap).

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 implies use for setting a single tile at a specific cell, but does not explicitly guide when to use this versus alternatives like set_tiles or add_tile. No exclusion criteria or prerequisites (e.g., tilemap layer must exist) are mentioned.

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