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

Goes well beyond the annotations (readOnlyHint=false, destructiveHint=false) by disclosing delivery mechanics: a private link expiring after 24 hours, a TOS checkbox page where only the ticked box counts as agreement, and rate limits of 10 logo packs / 2 kits per 24 hours with failed or duplicate downloads excluded. That is exactly the side-effect and quota context an agent needs before invoking.

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?

Substantial but nearly all of it is load-bearing: mode definitions, delivery, TOS, quotas, and state sourcing. It is front-loaded with the trigger condition, though the single-paragraph run-on form makes the quota and state-passing rules harder to scan than they could be.

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?

Despite a nested state object and no output schema, the description covers return shape (a private 24-hour link to a download page), required user consent, quota behavior, and how to obtain the state value. Nothing needed to call it correctly or to explain the outcome to a user 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?

With 100% schema coverage the baseline is 3, but the description adds sourcing semantics the schema cannot: the state must be passed exactly as a prior Webba result produced it (e.g. a find_designs result) and must not be hand-edited. Type selection is also grounded in user intent language rather than just the enum values, though the 'do not edit' instruction partially duplicates the schema description.

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 concrete action (produce a design's downloadable files) and disambiguates the two modes precisely: 'logo' is 24 logo files, 'kit' is ~100-110 files including logo, social, print, brand guide and a site. The sibling relationship is also explicit, since it names find_designs and start_build as the sources of a valid design.

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 the triggering condition ('when the person is happy with a Webba design and wants its files'), an explicit prohibition ('Do not use this before a design has been shown'), the sibling that must precede it, and a decision rule for choosing type='kit' when the user asks for the brand kit or complete kit.

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