tilemap_set_cell

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

No annotations are provided, so the description carries the full burden of disclosing behavioral traits. It only states the core action and does not mention whether it overwrites existing tiles, what happens with invalid coordinates, layer behavior, or any side effects. This is a mutation tool, so such gaps are significant.

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, front-loaded sentence with no wasted words. However, it is overly brief for a tool with 8 parameters, and the brevity comes at the cost of necessary detail, making it under-specified rather than cleanly concise.

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 has 8 parameters, no annotations, and no output schema, the description is severely incomplete. It provides no information about return values, parameter semantics, or operational behavior, making it inadequate for correct invocation.

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%, and the description only hints at 'x,y' but does not explain any of the 8 parameters (x, y, layer, atlas_x, atlas_y, source_id, alternative). It fails to compensate for the schema's lack of descriptions.

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 specifies the action ('Place one tile'), the resource ('TileMapLayer or legacy TileMap'), and the location ('at grid x,y'). It distinguishes this from sibling tools like tilemap_fill_rect (placing many tiles) and tilemap_get_cell (reading a tile).

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 phrase 'Place one tile' implies a single-tile use case, which indirectly differentiates it from tilemap_fill_rect. However, there is no explicit mention of when to use this tool versus alternatives, nor any exclusions.

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