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

Annotations already cover the safety profile (not read-only, open-world, non-idempotent, non-destructive), and the description adds genuinely non-obvious behavior: existing individual accounts are absorbed rather than recreated. It still omits side effects an agent would want, such as whether invitations are emailed or whether the returned API key is shown only once.

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, front-loaded with the action, then the key behavioral caveat, then the return value. No filler and nothing buried.

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 need not explain return shape, yet it still flags the API key. Combined with annotations covering the mutation profile, the remaining gap is only field-level parameter meaning, which is minor at this complexity.

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 0% — all four parameters carry only titles and defaults. The description does not explain what name or contact_email are used for (billing contact? admin identity? invitation target?) or what industry affects, so it fails to compensate for the schema gap.

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?

States a specific verb and resource: 'Register an organization account.' The clause about employees keeping individually-created accounts scopes it to org-level registration, but it never names the sibling register_account as the individual path, so sibling differentiation is only implied.

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 account-preservation sentence hints that this is the org-tier path rather than individual signup, but there is no explicit 'use this when / use register_account instead when' routing, and no prerequisites such as admin authority or email-domain requirements.

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