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

With no annotations, the description carries the full burden. It implies a read operation via 'Get' but does not disclose any behavioral traits such as authentication requirements, rate limits, data granularity, or whether the counts are real-time or cached. The description simply restates the tool's function without adding contextual depth.

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, well-structured sentence that conveys the core purpose without any filler. It is appropriately concise for a zero-parameter tool, with every word earning its place.

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?

While the description states the essential purpose, it does not specify what the counters include (e.g., API calls, storage, active users) or how plan entitlement consumption is reported. Given that there is no output schema and no annotations, a bit more detail would help the agent understand what to expect from the response. Still, for a zero-parameter read-only tool, the description is minimally viable.

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?

The tool has zero parameters, so there is no parameter meaning to add. According to the baseline, a zero-parameter tool receives a 4 because the schema is complete and the description does not need to compensate.

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 uses a specific verb ('Get') and identifies the resource ('workspace usage counters and plan entitlement consumption'), which clearly distinguishes it from siblings like workspace_health or get_analytics. The tool's purpose is immediately actionable.

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 about when to use this tool versus alternatives such as workspace_health, get_analytics, or account_capabilities. There are no usage criteria, exclusions, or alternative tool references.

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