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

Annotations cover safety (readOnly=false, destructive=false, openWorld=true, idempotent=false), and the description adds real context beyond them: key-only auth with no password, a prepaid wallet created for metered tools, and future rebinding via claim_agent. It does not disclose error behavior (e.g. duplicate name) or whether registration is gated, so it is helpful but not complete.

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?

Four short sentences, each carrying a distinct fact: what is created, the auth model, the side effect (wallet), and the lifecycle note. The identifying detail is front-loaded and nothing is repeated from the title.

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?

An output schema exists so return values need not be described, and annotations cover the safety profile; the description supplies the auth model and a notable side effect. The remaining gap is failure/duplicate-name behavior and the meaning of the optional identity fields, which for a creation tool matters somewhat.

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%, so the description carries the full burden, and it only illuminates ed25519_pubkey as the sole credential. The other three parameters — name, intended_use, and operator_contact — get no explanation of format or role anywhere, leaving the operator_contact vs. wallet relationship ambiguous.

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 and pins the distinction down with '(entity_type=agent)', which separates it from register_account and register_org in the sibling list. An agent can tell what this creates without opening the schema.

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?

Explains the credential model ('the Ed25519 public key is the only credential — no password') and points to the follow-up path via claim_agent, which is an explicit alternative/reference. It does not explicitly say when to pick this over register_account or register_org, so it stops short of full routing guidance.

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