update_qr_destination

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

With no annotations, the description discloses the key behavior (QR image unchanged, URL updated) but lacks information on side effects, permissions, or rate limits. Adequate but not comprehensive.

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?

Three sentences: purpose, behavior, use cases. Front-loaded, no redundant words, perfectly scoped for quick understanding.

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?

Describes only destination update but the tool also updates label, expiration, scheduling, and GTM container. No output schema exists; description should at least hint at additional capabilities.

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 coverage is 100% and its descriptions are already clear. The tool description adds no new parameter-level meaning beyond summarizing the core action.

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?

Clearly states the tool changes the destination URL of an existing QR code. Uses specific verb+resource ('change where an existing QR code redirects to') and highlights the dynamic link feature, distinguishing it from creation and other update tools.

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?

Describes when to use: updating campaigns, fixing broken links, A/B testing. Implies context (dynamic vs. static QR codes) but does not explicitly exclude alternative tools or mention prerequisites.

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