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

readOnlyHint=true already tells the agent this is a safe read, so the description doesn't need to argue safety. It adds modest value by naming the returned fields (recipients, subject, sender, logic), effectively disclosing the response shape in the absence of an output schema, but says nothing about ordering, pagination, or empty-result behavior.

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 front-loaded sentence covering purpose and returned content, followed by the concrete API route. No filler, no redundancy, and the most important information (what is listed) comes first.

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 one-parameter read tool with no output schema, the description covers what the tool does and what the records contain, which is enough to invoke it correctly. Minor omissions (result ordering, pagination, whether a form can have zero notifications) keep it short of a 5.

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?

There is a single parameter, form_id, and the schema documents it at 100% coverage, so the description has no gap to fill. It restates the path variable via the embedded endpoint (GET /forms/{formId}/notifications) but adds no format or constraint detail beyond the schema. Baseline 3 for full schema coverage.

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 gives a specific verb and resource ('List the notification emails') and enumerates the payload it returns (recipients, subject, sender, logic), so the resource is unambiguous. It never names the closely related sibling formstack_list_confirmation_emails, so the agent gets no explicit differentiation from that near-identical 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?

The 'when a form is submitted' clause implies the scenario in which these emails fire, which gives an implicit sense of when the tool is relevant. There is no explicit when-to-use statement, no exclusions, and no routing to the confirmation-email or submit-action siblings.

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