navigation_add_region

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

No annotations provided, so the description is the sole source of behavioral info. It only states the action and lists parameters. There is no mention of side effects, permissions, or whether changes are saved immediately. This is insufficient for a creation tool.

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 well-structured with a header, category, and bullet list for arguments. It is concise without unnecessary words. However, the Args section could be more compact by integrating parameter details inline.

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 covers the basic operation and parameters. An output schema exists, so return values are not needed. However, it omits context like requiring an existing scene or potential errors. For a simple add tool, it is adequate but not thorough.

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%, but the description's Args section adds meaning to all 5 parameters: explains that scene_path is relative to project, parent_node_path indicates the parent, and region_type defaults to NavigationRegion2D. This compensates well 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?

Description clearly states 'Add a navigation region to a scene' with a specific verb and resource. It distinguishes itself from sibling navigation tools like navigation_add_agent and navigation_add_obstacle by focusing on region addition.

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. The description does not mention any preconditions, exclusions, or comparison to other navigation tools. It only describes the basic function.

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