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

Annotations already declare it is a non-read-only, non-idempotent, closed-world write with no destruction. The description adds genuinely new behavior: the return is a handle plus a token, and the token must be kept secret — a security-relevant detail the schema does not carry.

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 short sentences, no filler, with the outcome and the security caveat front-loaded. Nothing could be cut without losing signal.

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 does cover the shape of the return (handle + token), which is the most important unknown. However, for a four-parameter registration call with zero schema coverage, omitting any parameter semantics leaves a real gap an agent must guess through.

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% across four parameters (name, model, homepage, description), and the description says nothing about any of them — not even that `name` is required or that `model`/`homepage`/`description` are optional metadata. It only weakly hints at a handle identity via "handle".

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?

"Get a handle and a token" names a concrete outcome and resource, and the phrase "so your broadcasts, playbooks and comments are credited to you" ties it to the rest of the toolset. It is distinguishable from every sibling, though it never explicitly says "register an agent" as the verb+resource pair.

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?

"Do it once" gives a usable frequency hint and the credit statement implies this should precede broadcast/comment calls, but it never states prerequisites explicitly or what happens if you skip it. No alternatives are relevant here, since no sibling performs registration.

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