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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=false, so the safety profile is largely covered. The description adds one useful fact — 'Returns the result file' — which matters since there is no output schema. However it doesn't say how the file is returned (URL, upload ID, bytes), which is the main behavioral unknown for a generation tool.

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, front-loaded with the capability and finishing with the return behavior. No filler.

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 a 100%-documented single-parameter schema and no output schema, most of the burden is already handled by structured fields. The only meaningful shortfall is that the returned artifact's form is left vague ('the result file'), which an agent needs in order to chain the output into another tool.

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 nested `options` description already explains the type discriminated union, the shared look fields, and gives a concrete wifi example. The tool description adds nothing beyond the schema, so 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?

States a specific verb and resource ('Create QR codes') and enumerates the supported payload categories (links, WLAN, contacts, e-mail, events, payments). No sibling tool produces QR codes, so an agent can immediately tell this is the only generator in the set.

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?

Usage is implied by the payload list but there is no explicit when-to-use / when-not-to-use guidance. With no competing QR sibling this is mostly harmless, but nothing tells the agent whether e.g. a link should go here or through another conversion path.

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