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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so safety is fully covered by structured data. The description adds useful domain context that this listing is the owner's earning path and does not itself trigger booking, though it does not describe pagination or response shape.

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 operative guidance is front-loaded and efficient in German. The trailing EN keyword list ('end user, customer, portal, notification, map, scope') is somewhat noisy and less useful than the preceding sentences, costing a point on structure.

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 parameterless, read-only listing tool with rich annotations and no output schema, the description covers what the tool does, when to use it, and which siblings handle adjacent tasks. It could say a bit more about what a returned public scope contains, but nothing critical is missing for correct selection.

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, so there is nothing parameter-specific to clarify. The baseline for a parameterless tool applies, and no misleading parameter information is present.

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 a precise verb and resource: listing publicly bookable scopes from other providers. It immediately distinguishes this from own-scope listing and from booking/service-request tools, so an agent can select it without opening the schema.

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 gives explicit when-to-use guidance ('see which foreign areas you could book') and names the correct alternatives: ontouser_service_request for booking/requesting, and ontouser_scope_index for one's own scopes. This is close to ideal routing information.

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