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

Annotations already declare readOnlyHint, idempotentHint and closed-world, so safety is covered. The description adds genuinely useful behavior beyond that: it discloses that one bag count is reported unrounded and another as whole sacks, which tells the agent how to interpret the numeric outputs.

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?

Two sentences, front-loaded with the operation and the inputs, then the outputs. The only mild waste is the opening repetition of the title before the substantive content.

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?

With no output schema, the description correctly compensates by enumerating the four returned quantities with units and rounding semantics. All six parameters are schema-documented, so nothing an agent needs before calling is missing; only the opaque 'region' effect is left entirely to the schema.

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?

Schema description coverage is 100%, so units, ranges and the DE/CH enum are already documented in the schema. The description reinforces the concepts (Fläche, Dicke, Verschnitt) but adds no syntax or selection advice beyond what the properties already say; baseline 3 applies.

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?

Specific German verb-plus-resource with an explicit inventory of what is computed (Volumen in m³, Gewicht in kg, Sackanzahl mit Verschnitt), so an agent knows exactly what the tool returns. It cannot distinguish itself from the opaque bot_0xx siblings, but the purpose itself is unambiguous.

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?

It states which inputs to supply ('Fläche und Dicke eingeben') but gives no guidance on when to choose this tool over alternatives, nor any prerequisites or exclusions. Usage has to be inferred from the input list alone.

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