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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is covered. The description adds genuine value with the PRO entitlement gate and the required share-link prerequisite, but it leaves the return shape ambiguous — image bytes vs. a URL — which matters for a tool with no output 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 sentences, front-loaded with what the tool returns and where it points, followed by the prerequisite. No redundant restatement of the name or title.

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 read-only tool, the description covers purpose, entitlement (PRO), and the ordering dependency on create_takemeup_share_link. The only gap is not clarifying whether the response is an image payload or a link, which an agent would want to know before calling.

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 cvId documented (source: list_my_takemeup_cvs) and locale carrying an enum plus default behavior. The description adds nothing about either parameter, so it sits at the baseline where the schema does the work.

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?

Names the specific resource ('QR code image for one of the user's CVs') and its target ('pointing to its public QR link'), plus concrete use cases (business cards, events, printed CVs). This clearly separates it from get_takemeup_download_link or get_takemeup_cv_preview, though it doesn't name those siblings explicitly.

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?

Gives a clear usage context (printed CVs, events, business cards) and an explicit prerequisite: an active QR link must exist, created via create_takemeup_share_link with purpose 'qr'. It names the enabling tool but does not state when to prefer other retrieval tools instead.

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