register_anonymous_user

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

Annotations already declare the tool as non-readonly, non-destructive, non-idempotent, and open-world. The description adds genuinely new behavioral context: a write-gate environment flag and an explicit warning that the mutation has not been live-tested, which an agent needs before invoking it.

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?

Telegraphic and front-loaded: endpoint, mutation gate, and validation caveat all appear in the opening lines with no filler. The final sentence repeats the 'not live-tested' caveat already implied earlier, which is minor redundancy.

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?

This is far more complete than the schema alone: it names the exact request proto, the API path, the write gate, and the untested-mutation risk, all before an agent commits. The warning about FLIGHTY_ALLOW_WRITES alone prevents a likely failed call, and the proto reference tells the agent exactly where to look for the body shape.

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?

With 0% schema description coverage, the description must carry the parameter burden. It usefully ties payload to get_schema('CreateUserRequestProto') and rules out path parameters, but says nothing about the query object or the confirm_destructive flag, leaving half the parameters undocumented.

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 gives a concrete verb and endpoint (POST /v1/user) for registering an anonymous user, so the action is identifiable. However, it offers no differentiation from nearby siblings such as register_device or link_account, and the first clause largely restates the tool name.

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 only guidance is the precondition that FLIGHTY_ALLOW_WRITES=true must be set. There is no statement of when to prefer this tool over alternatives or what situation calls for an anonymous registration rather than an account-linked one.

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