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

Annotations already indicate this is a mutating, non-idempotent operation, so the description only needs to add context. It adds plan gating, quota consumption, and the return behavior including rejected rows, which are useful behavioral details beyond the annotations.

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 information-dense sentences with zero filler: the action and limit, the alternative for free users, and the row format plus quota and return behavior. Everything earns its place.

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 single-parameter bulk creation tool with an output schema, this description covers what the tool does, when to use it, plan constraints, quota impact, input shape, and return behavior. Nothing essential is missing.

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 0%, so the description must carry parameter meaning. It explains rows as [{destination, label?}], clarifies that destination is a web address, and notes accepted forms like url/link/bare string. It does not define 'label' beyond being optional, but the core parameter semantics are covered.

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 many dynamic URL codes at once'. It also explicitly contrasts with the sibling create_qr_code by noting the free plan should use the one-at-a-time tool, so an agent can distinguish them without opening either schema.

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?

Provides explicit when-to-use guidance: Premium is required, and 'on the free plan use create_qr_code one at a time'. It also names the exact alternative tool and adds the monthly bulk allowance constraint, leaving little to inference.

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