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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds real context beyond that: it handles both signed-in and offline modes and consolidates multiple lookups into one call. Nothing is contradicted, but no limits or failure behavior are mentioned.

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?

Three short sentences with the imperative 'Start here' front-loaded, then the payload, then the mode handling. Every sentence carries information and none is padding.

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 an output schema present, the description needn't explain return values, and it still helpfully enumerates them. For a no-param bootstrap tool with annotations covering safety, the definition is essentially complete; the only soft spot is the unaddressed overlap with proofable_verifiers_catalog.

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?

The tool takes zero parameters, so parameter semantics are not a concern and the baseline is 4. The description correctly implies no input is required to obtain context.

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 purpose: a bootstrap call that returns the signed-in profile, available verifiers, and a recommended workflow in a single call. This clearly distinguishes it from the agent/secret/proofs siblings. It does not, however, clarify how its 'available verifiers' output relates to the proofable_verifiers_catalog sibling, leaving a small ambiguity.

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?

'Start here' is an explicit routing instruction that tells the agent to call this first, and 'no separate profile tool needed' steers it away from hunting for a profile tool. There is no explicit when-not guidance or named alternative among the siblings, so it stops short of a 5.

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