credits

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

No annotations are provided, so the description carries the full burden. It states 'Check', implying a read-only operation, but does not explicitly confirm no side effects, rate limits, or authentication requirements. Basic behavioral information is missing, resulting in a low score.

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, front-loaded sentence that conveys all necessary information without filler. Every word is useful, making it highly efficient.

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 no output schema and low complexity, the description adequately covers the tool's purpose. However, it does not specify the structure or format of the returned data, which could be improved for completeness. It 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?

There are zero parameters, and schema coverage is 100% (empty schema). The description fully compensates by explaining what the tool returns (remaining credits, tier, usage), adding complete meaning beyond the schema.

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 the tool checks credit balance and specifies what information is returned (remaining credits, tier, usage). The verb 'Check' and resource 'Sessemi API credit balance' are specific, and it distinguishes from the sibling tool 'scrape', which likely scrapes data.

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 the user needs to know their credit balance, tier, or usage. Context is clear, but there is no explicit guidance on when not to use it or alternatives. Given only one sibling, the intent is well understood.

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