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

With no annotations, the description carries the full burden for behavioral transparency. It only states the action (retrieving balance) but does not disclose whether it is read-only, whether it requires authentication, what side effects (if any) occur, or any rate limits. For a simple query tool, this is minimal but acceptable; however, it lacks explicit safety cues.

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 with no unnecessary words. It is front-loaded with the key information ('Aktuelles Token-Guthaben') and the parenthetical adds relevant context. Every word earns 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?

Given the tool's simplicity (zero parameters, output schema exists), the description is mostly complete. It clearly states what the tool retrieves. However, a brief mention of the output structure (e.g., 'returns current token count') would improve completeness, but the output schema already covers that, so the description is adequate.

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 input schema has no parameters and schema description coverage is 100%, so the baseline is 3. The description does not add any parameter semantics because there are none, and it does not need to. It correctly implies no parameters are needed for the operation.

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 states the tool's purpose: retrieving the current token balance of the own organization. The phrase 'Aktuelles Token-Guthaben der eigenen Organisation' is clear, and the parenthetical 'Solves kosten Tokens' adds context about the token usage. However, it does not explicitly use a verb like 'get' or 'check', and the German phrasing may be slightly ambiguous for non-native speakers, which prevents a perfect score.

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 its siblings (e.g., solve_submit, service_info). The description does not mention prerequisites, alternatives, or exclusions, leaving the agent to infer usage context from the tool name alone.

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