get_usage

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

With no provided annotations, the description fully discloses the tool's read-only nature ('Get'). It does not mention authentication, rate limits, or any other behavioral traits, but for a simple retrieval operation, this may be sufficient.

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 of 11 words, containing only essential information. No redundancy or unnecessary detail.

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 minimalist. While it explains the tool's purpose, it does not detail the return structure or any additional context beyond the basics. For a tool with no parameters and no output schema, this may be borderline adequate but leaves the agent guessing about the output format.

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?

There are zero parameters, so the baseline is 4. The description adds no parameter-specific information, which is acceptable given the tool's stateless nature.

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 clearly identifies the resource 'credit usage and subscription information for your Pubrio account'. It distinguishes itself from all sibling tools, which focus on monitors, lookups, and other operations.

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 implies the tool should be used when one needs account usage or subscription details, but it does not explicitly state when to use it versus alternatives or when not to use it. No exclusions or alternatives are mentioned.

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