game_tilemap

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

Annotations provide minimal context (only title). The description only states 'get or set cells', but does not disclose any behavioral traits such as whether setting cells overwrites existing ones, if it requires any permissions, or what happens on failure. For a tool with no safety annotations, this is insufficient.

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 sentence, concise and front-loaded. However, it could be slightly expanded to cover the different actions without becoming verbose.

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?

The description is incomplete for a tool with 4 actions and no output schema. It mentions only 'get or set cells', omitting 'erase_cells' and 'get_used_cells'. It also does not describe what is returned for get operations, leaving significant gaps for the agent.

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% with descriptions for all 6 parameters. The tool description does not add any meaning beyond what is already in the schema, so the baseline score of 3 is appropriate.

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 gets or sets cells in a TileMapLayer node, using a specific verb and resource. However, it does not differentiate from sibling tools like game_gridmap, which might have similar functionality.

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 vs alternatives, no prerequisites, and no context about when to choose between the different actions (set_cells, get_cell, etc.).

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