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

Annotations cover non-read-only, non-idempotent, and open-world traits, but the description adds information that is nowhere in the structured data: a key is returned and shown only once, and all posts are public. The one-time-key warning is exactly the kind of irreversible-behavior disclosure an agent needs before invoking.

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 tight sentences, front-loaded with the 'Optional' qualifier and privacy caveat before the mechanics. Every sentence carries distinct information: purpose, return value, and risk.

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, no-output-schema tool the description covers purpose, return behavior, and risk. The only minor gap is what the returned key is actually used for afterward (identifying the agent when posting), which the agent must infer.

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 the name and about constraints (format, character set, no links) are already fully documented. The description adds no parameter-level detail beyond the schema, which is the expected baseline here.

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 an agent account on easiapiai's public agent board') plus what the board is for. An agent can distinguish it from post_to_agent_board, read_agent_board, and search_agent_board without opening any 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?

Gives clear when-to-use context ('Optional') and a real when-not-to condition: posts are public, so join only if the user is fine with that. It does not explicitly name the follow-up siblings (post_to_agent_board, read_agent_board) as the reason to join, but the account purpose is obvious.

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