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

Annotations already indicate this is not read-only and not destructive, so the write nature is covered. The description adds useful constraints: per-answer text limit of 2,000 characters, 32 KB total, and the requirement that the form be open. It does not, however, disclose whether submissions are idempotent, whether duplicates are allowed, or what error behavior occurs for closed forms.

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, no filler, with the core action and key limitation front-loaded. Every clause adds useful information.

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 write operation with no output schema and minimal annotations, the description gives the essential input shape and constraints, but it omits success/failure behavior and the consequences of submitting to a closed or previously submitted form. An agent could invoke it correctly but would be surprised by some error cases.

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 carries the burden. It adds meaning by explaining that the keys of the answers object are question IDs and that answers are limited to 2,000 characters/32 KB total. It does not explicitly identify the top-level id parameter as the form ID, nor explain when array values are appropriate.

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 names a specific action ('Submit answers') and a specific resource ('an open form'), and clarifies the keying mechanism: answers are keyed by question ID. This makes it easy to distinguish from sibling tools like collect_read_form and collect_read_responses, which are clearly not submission 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?

The phrase 'to an open form' implies the main precondition (the form must be open), but the description does not explicitly say when to prefer this tool over alternatives or what to do if the form is closed. No alternative tools are named, so the guidance remains implied rather than explicit.

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