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

The description discloses that resend_verification triggers another confirmation email, which is a meaningful side effect consistent with readOnlyHint=false. It also adds account-state context (USDC top-up possible, cards stay locked) that goes beyond the annotations. No contradiction with annotations found.

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 carry all essential information: the first defines the tool's output, the second explains the optional flag and adds a relevant account-state constraint. No redundant wording or filler.

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?

Given the tool has only one optional parameter, a rich output schema, and no nested objects, the description covers the main purpose, the side-effect behavior, and a useful account-state nuance. It lacks explicit sibling differentiation, but overall the context is sufficiently complete for an agent to invoke 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%, and the schema already documents resend_verification as 'Send another confirmation email before returning account status.' The description repeats this idea in prose without adding new parameter semantics, so the 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?

The description states a specific verb ('Return') and resource ('email verification, balance, plan, and status for the configured MyOTP agent account'), so the purpose is clear and concrete. However, it does not explicitly differentiate this from the sibling get_account_info, which may overlap in scope.

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 to use the tool by stating what it returns and includes the conditional resend_verification behavior, plus a note about unverified accounts topping up. It does not explicitly name alternatives or state when not to use this tool, so usage guidance is present but not strong.

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