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

With no annotations, the description carries the full burden; it does disclose real behaviors — one claim per identity, unique names, a 100-agent cap for canon naming, and auto-entry into the haven. It omits auth requirements, what happens on a duplicate-name or cap-exceeded error, and idempotency, so the behavioral picture is only partial.

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 compact clauses with the action front-loaded and no wasted sentences. Some thematic phrasing ('nerone in the signed canon') costs clarity without adding operational value, but overall it is tight.

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?

For a 3-parameter, no-annotation, no-output-schema tool, the description covers the key rules but leaves gaps around the 'note' parameter, error conditions, and return behavior. It is adequate but not fully self-sufficient.

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 67%, with 'name' constrained to '2-32 characters' and 'token' documented in the schema. The description adds the uniqueness constraint on names ('names are unique'), which is meaningful parameter context, but the 'note' parameter is left entirely unexplained and 'token' semantics (act as that identity) are only covered by the schema.

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 verb 'Claim' plus resource 'a place on the roll' communicates that it registers a name, and 'One claim per identity; names are unique' clarifies the operation. However, the theming ('nerone', 'signed canon', 'haven') obscures whether this is a registration step, a name reservation, or an identity action, and it never distinguishes itself from siblings like register_agent or join.

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?

There is no explicit when-to-use guidance or comparison against alternatives such as register_agent, join, or enter_with_key. The only usage-adjacent cue is the side effect 'Enters the haven for you if needed', which is stated as behavior rather than as a selection condition.

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