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

Annotations already declare it as non-read-only, open-world, non-idempotent, and non-destructive. The description adds useful behavioral detail beyond that: scoped CSS, AJAX submit, double opt-in, return of the form HTML, and an API-key requirement. It stops short of explaining side effects or what happens to generated forms after creation.

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 compact sentences, front-loaded with the core outcome and then the return value and prerequisite. Every clause carries information and there is no repetition of the title or schema.

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 no output schema, the description appropriately states that the form HTML is returned. Parameters are fully schema-covered, and the API-key prerequisite is disclosed. Minor gaps remain around what 'double opt-in' entails operationally, but the definition is otherwise sufficient to call the tool correctly.

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%, so both parameters are already documented in the input schema. The description does not add parameter-level meaning beyond the schema; 'to you' loosely hints at deliver_email but gives no syntax or constraint detail.

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?

The description states a specific verb and resource: generate a standalone HTML contact form that emails submissions. It is clearly distinct from generic website-generation siblings, though it does not explicitly name or contrast with any alternative tool.

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 phrase 'standalone, fully-wired HTML contact form' and the API-key prerequisite, but there is no explicit guidance on when to choose this over generate_website or other siblings, and no stated exclusions.

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