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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds real behavioral detail beyond that: guests receive an empty version-0 context plus claim/sign-in instructions, while account holders get confirmed data and the full version history.

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?

It is dense but grammatically tangled ('answers the empty context ... with claim, where to sign in'), and it front-loads the guest edge case before the common account case. Nothing is wasted outright, but clarity suffers from the run-on construction.

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 carries the burden of describing returns — and it does, enumerating claim/sign-in instructions for guests and name/summary/audience/version/history for accounts. Only the exact response shape remains unspecified, which is a minor gap.

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 enum parameter is fully documented in the schema, so the baseline is 3. The description's 'Optionally one section' merely restates the schema's optionality without adding format or selection guidance.

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 clearly identifies the resource — the caller's saved company context (name, summary, audience), its version, and version history — with a distinct guest-case behavior. The verb is implied rather than stated ('answers'), and it never contrasts itself with siblings like resolve_audience, which also touches audience data.

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?

It implies when it applies by splitting guest vs. account behavior, which is genuinely useful routing context. However, it gives no explicit when-not or alternative-tool guidance, so an agent cannot tell from this text when to prefer resolve_audience or guest_status over brain_get.

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