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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=true, so the write/open-world profile is covered. The description goes beyond that by disclosing a concrete rate limit (5 tickets per day) and its intent, which is genuinely useful behavioral context an agent cannot derive from annotations or schema.

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 short sentences: the purpose first, then the constraint. Every clause earns its place and nothing is padded or repeated from the schema.

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 two-parameter creation tool with no output schema and annotations already covering safety semantics, the description supplies what is needed: the action and the daily cap. It omits only minor details such as authentication requirements or what is returned after creation (ticket ID), which is a small gap.

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% with only two required string parameters (subject, message), so the schema already carries the parameter documentation. The description adds no format, length, or content guidance beyond that, which matches the baseline for full schema coverage.

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 (eröffnet/creates) and resource (Support-Ticket), so the agent immediately knows this is the creation path for tickets. It does not explicitly differentiate itself from siblings like reply_to_ticket or close_support_ticket, but the verb+resource pairing makes the distinction inferable.

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 when the tool is used (creating a new ticket) and adds an operational constraint of max 5 tickets/day, which tells the agent when a call may fail. However, it never names alternatives such as reply_to_ticket for existing threads or get_support_tickets for reading, so no explicit when-not guidance is given.

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