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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the safety profile is partly covered. The description adds only that the ticket is one's 'own' and already exists; it says nothing about whether closing is reversible, whether the ticket can be reopened, whether confirmation or special permissions are required, or what happens to the ticket afterwards.

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?

A single short sentence with no filler, and the action verb is front-loaded. It is efficient, though the extreme brevity leaves substance to the other dimensions rather than adding structure or scoping detail.

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 one-parameter mutation tool with no output schema and full schema coverage, the description is minimally sufficient to call the tool. It still omits what an agent would want to know before acting: whether closing is final, what state the ticket ends in, and any authorization scope beyond 'eigenes'.

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% and the single parameter ticket_id is documented in the schema as the internal ID shown by get_support_tickets, so the baseline is 3. The description adds no additional parameter meaning beyond that.

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?

States a specific verb and resource ('Schließt ein bestehendes ... Support-Ticket'), which clearly separates it from create_support_ticket, get_support_tickets and reply_to_ticket in the sibling list. It does not, however, explicitly name those siblings or contrast behavior with them.

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?

'bestehendes eigenes' implies a precondition (the ticket must already exist and belong to the caller), which is useful usage context. But there is no explicit when-to-use guidance and no routing to alternatives such as reply_to_ticket when the user actually wants to respond rather than close.

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