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

Annotations already establish the safe-read profile (readOnlyHint=true, destructiveHint=false, openWorldHint=false), so the description's extra value is the return payload: it names the settings groups plus isDefault, availableEmailDomains, defaultFromAddress, and payment. No output schema exists, so this disclosure is genuinely additive; it stops short of describing auth needs or domain-verification semantics.

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: purpose first, return shape second. Every clause (email config, domains, Stripe status, response keys) earns its place for a tool with no output 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 correctly compensates by enumerating the response object's top-level keys, and the single required param is fully documented in the schema. Slightly incomplete in that it does not explain what isDefault distinguishes or how availableEmailDomains differs from the active domain.

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?

Single formId parameter with 100% schema description coverage ('Form ID to get settings for'), so the schema carries the semantics. The description adds nothing about the identifier's format or source, which is the expected baseline-3 outcome here.

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?

Specific verb+resource ('Get form settings') with an enumeration of exactly what the settings contain: notification email config, respondent emails, email domains, Stripe payment status. This implicitly separates it from form_get (form metadata) and formSettings_update, though it never names those siblings to make the split explicit.

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?

No when-to-use guidance, no prerequisites, and no pointer to formSettings_update as the mutation counterpart. The agent must infer from the name that this is the read side of the settings pair.

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