xr18_describe_command

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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It implies a read-only operation (validation and metadata retrieval) but does not state whether it has side effects, requires special permissions, or behaves differently for invalid paths. The description also doesn't clarify error handling or whether the tool is safe to call repeatedly. This is a significant gap given zero annotation coverage.

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, concise sentence with no extraneous words. It starts with the verb 'Validate' which immediately signals the action, and the object and outcome are clearly stated. It is appropriately sized for a tool with one parameter and a simple operation, making it easy to parse quickly.

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 simplicity (one parameter) and the presence of an output schema (which is not shown but noted as existing), the description does not need to explain return values. However, it lacks context about when to use this tool, what the registry metadata includes, and how it relates to the sibling commands. The description is minimally sufficient for an agent to understand the basic function but lacks enough detail to make confident usage decisions without additional probing.

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 compensate. It mentions 'concrete OSC path', giving a hint about the expected input format, but it does not define what constitutes a valid path, provide examples, or clarify whether paths are case-sensitive or have a specific structure. The parameter 'path' is only typed as a string with no additional context, leaving the agent to guess the expected value.

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 states a specific action ('validate') on a resource ('concrete OSC path') and the result ('return its registry metadata'). This is distinct from sibling tools like get/set/trigger, which perform operations rather than validation. However, it doesn't explicitly differentiate itself from xr18_list_commands, which might also return metadata, leaving some ambiguity.

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 provides no guidance on when to use this tool versus alternatives. There is no mention of prerequisites, typical use cases, or conditions under which a different tool (e.g., xr18_list_commands) would be more appropriate. The agent must infer usage solely from the tool name and description, which is insufficient.

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