update_units_by_item

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

No annotations are provided, and the description is completely silent on behavioral traits. For a write operation, there should be disclosure of side effects, permissions required, or idempotency, but none is given.

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?

While very short, the description is not concise in a helpful sense; it is under-specified. It fails to front-load any useful information or structure that aids understanding.

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 complexity (14 parameters, no annotations) and the presence of sibling tools, the description is woefully incomplete. An agent cannot determine the tool's behavior, required inputs, or return value from this description alone.

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?

With 14 parameters and 0% schema description coverage, the description provides no additional meaning. It does not explain any parameter's role, format, or constraints, leaving the agent blind to how to populate the input schema effectively.

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 'Update One' is a tautology that does not specify what resource is being updated. It fails to communicate the tool's purpose beyond what the name implies, and does not distinguish it from sibling tools like update_units_merge.

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 is provided on when to use this tool versus alternatives. The description lacks any context about prerequisites, use cases, or exclusions, offering no help to an agent in selecting this tool over other update tools.

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