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

With readOnlyHint=true declared by annotations, the safety profile is covered. The description adds useful return-payload information (sender, subject, message, delay) and names the underlying endpoint, going beyond what the annotations provide. Pagination and auth behavior remain unstated, keeping it from a 5.

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?

One sentence plus a compact endpoint reference, front-loaded with the core purpose and no wasted words.

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 simple read-only list tool with full schema coverage and no output schema, the description compensates by naming the returned fields and the API route. It is nearly complete, though it omits details like pagination or ordering that could matter for list results.

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 the single parameter (form_id) is already documented in the schema. The description adds no syntax, format, or constraint details beyond what the schema provides, so baseline 3 applies.

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 ('List the confirmation emails') and clarifies the audience ('sent to the person who submits a form'), which distinguishes it from notification emails. An agent can tell what it does without opening the 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?

The description implies when this tool is relevant by scoping it to submitter-facing confirmation emails, but it never names the alternative (e.g., formstack_list_notification_emails) or states explicit when/when-not conditions. Usage is inferable but not spelled out.

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