get_usage_stats

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

With no annotations provided, the description must carry the behavioral disclosure burden. It does so by stating that the tool is free and does not consume a credit, which is a non-obvious behavioral trait. It also clearly implies a read-only operation. However, it does not mention potential nuances like reset timing or whether the count includes the current call, leaving minor gaps.

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 extremely concise, using two short sentences to convey the core function and the cost-related advantage. Every word earns its place, and the key information is front-loaded.

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?

For a zero-parameter, read-only reporting tool with no output schema, the description is complete. It tells the agent exactly what question the tool answers (calls made today) and the important operational detail (free). Nothing critical is missing for an agent to invoke and interpret the tool correctly.

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 and schema description coverage is 100%, so there is nothing to add. The baseline for zero-parameter tools is 4, and the description appropriately focuses only on the tool's purpose and cost, not on parameters.

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 clearly states what the tool does: it reports the number of calls made by the API key today. This specific resource and function distinguishes it from the sibling tools, which are all GSTIN/HSN lookup or search 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 provides clear context by explicitly noting that the tool is free and does not consume a credit. This implies it can be safely used for monitoring usage without cost, though it does not explicitly discuss when to use it over alternatives or state exclusions.

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