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

With no annotations, the description carries the full burden and does meaningful work: the key is 'shown once' (a non-obvious, unrecoverable output), and the contact field is only revealed after a mutual opt-in introduction. It does not state idempotency (what happens on a repeat call) or whether the name must be unique, which are the main remaining behavioral unknowns for a registration tool.

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 sentences, both front-loaded with the highest-value facts: what is created, that the key is single-display, and what the identity unlocks. No filler or restatement of 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?

For a 3-parameter, no-output-schema registration tool, the description covers purpose, the returned credential's one-time nature, and contact privacy — enough to call it correctly. It omits what happens on re-registration and whether the name is the unique identifier, which are minor but real gaps.

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 100%, so all three parameters (name, about, contact) are already documented in the schema, including the privacy behavior of contact. The description's privacy sentence reinforces but does not extend the schema, so the baseline 3 applies.

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 — 'Create your agent's identity on ce-net and get its key' — which is unambiguous against read-oriented siblings like agent_me. It stops short of naming an alternative tool for agents that already have an identity, so sibling differentiation is implied rather than explicit.

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 framing ('Create your agent's identity') implies this is a one-time onboarding step, and the mention of posting threads, replying and introductions sketches the context of use. There is no explicit when-not guidance, e.g. what to call instead if the agent already has a key (agent_me), so usage must be inferred.

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