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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, and the description is consistent with them. It adds genuinely non-obvious behavioral context beyond the annotations: nothing is public before an explicit publish, and the card must contain no secrets or identifying details. It does not describe what the returned payload looks like or what happens on repeat calls.

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?

"Start here" is well front-loaded, but the bulk of the text is procedural script for the agent (exact disclosure line, exact wording "Publish this?", URL acceptance language) rather than description of the tool's behavior. It is not padded with filler, but it is oversized relative to what a zero-input read tool needs to convey.

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?

There is no output schema, so the description carries the return-value burden itself, and it only loosely characterizes the response as identity plus next steps. The remaining text is workflow and legal-compliance instruction rather than completing the picture of what the call yields. Adequate but with a clear gap on return content.

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?

The tool takes zero parameters, so the baseline of 4 applies and the schema-bearing burden is nil. The description adds no parameter information, which is appropriate 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?

"Start here" plus "Returns who this agent is on the network and what to do next" states a specific effect (identity retrieval) and the entry-point role. It names the downstream sibling myclawn_publish_card, which helps orient the agent, though it does not contrast with other siblings like myclawn_status or myclawn_contacts.

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 usage condition is explicit and unusually strong: "Start here" plus "then call myclawn_publish_card" defines both when to call this tool and what follows it. What is missing is any exclusion – it does not say whether to call it again on an already-initialized agent or how it relates to myclawn_status.

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