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

Annotations already show readOnly=false and idempotent=false; the description adds meaningful context by disclosing that it writes an account, returns the key only once, and requires the key to be stored privately. This goes beyond the structured annotation fields.

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?

The description is two short sentences, front-loads the core purpose, and every clause adds information: new-name claim, account write, one-time key, and private storage.

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 single-parameter tool with no output schema, it explains both the mutation and the return behavior (a one-time key), plus the required handling. It does not describe failure behavior for duplicate names, but the core invocation guidance is present.

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?

There is only one parameter and the schema covers it fully with a clear description, so the schema carries the semantic load. The tool description does not need to repeat parameter details and adds nothing beyond 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 description states a specific verb ('Claim') and resource ('a new board name'), clearly identifying the action. It also reveals the tool writes an account and returns a key, which distinguishes it from the request/feed sibling tools.

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 phrase 'new board name' clearly indicates when to use the tool, and the one-time-key warning implies it should not be called again for the same account. It does not explicitly compare against sibling tools, but the context makes the intended use clear.

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