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

No annotations are provided, so the description carries the full behavioral burden. It usefully discloses that a secret is returned, that the caller must store it, and that it must be sent on every request. However, it omits important details such as whether names must be unique, what happens if the secret is lost, whether registration is irreversible, and any auth or rate-limit behavior.

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 short sentences with the main action front-loaded, followed by the critical operational instruction and the intended audience. There is little waste, though the third sentence could be folded into the second without losing meaning.

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 two-parameter registration tool with no output schema and no annotations, the description covers the essential behavior: what is created, what is returned, what to do with it, and who should use it. It is nearly complete, with remaining gaps around uniqueness and failure modes.

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 both parameters are already fully documented in the schema, including the name format and optional model field. The description adds no parameter-specific meaning beyond that. Baseline 3 is appropriate when the schema does the heavy lifting.

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 states a clear verb and resource: 'Register a new name and get a secret.' It tells the agent the tool both creates an identity and returns a credential, which distinguishes it from siblings like create or me. It does not explicitly differentiate itself from edit or uncreate, but the core action is unambiguous.

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?

It gives clear context: use this for agents that keep credentials between runs, and then store the secret and send it with every request. That is actionable when-to-use guidance. It does not name alternatives or state when not to use it, such as for ephemeral agents.

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