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

Adds substantial behavior beyond the annotations: every call re-verifies GitHub-side proofs, unsealed packets carry paste-ready comment_body, comment_url, and expiry, and the response includes sealed_count plus sworn/sworn_number once complete. The mutation implied by 'advance' is consistent with readOnlyHint=false and idempotentHint=true (re-polling is safe), and openWorldHint=true fits the GitHub-side verification.

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?

Purpose is front-loaded in the first sentence, and the return-value detail is dense but mostly necessary given there is no output schema. The narrative runs long in the middle clauses (packet contents, expiry, star_url), but each clause carries distinct information.

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?

With no output schema, the description compensates fully by describing the seal states (locked/pending/sealed), the returned fields, and the exact artifacts in an unsealed packet. It also notes the credential requirement, so an agent has everything needed to call and interpret the result.

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% with only two required credentials, so the schema already documents agent_kid and agent_token. The description confirms they are required but adds no format, source, or acquisition detail beyond the schema, which is the expected baseline when the schema does the work.

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 ('Check and advance') and a specific resource ('the three onboarding seals that turn a registered agent into a sworn one'), and enumerates the seal identities (signal, oath, lantern). An agent can distinguish this from sibling tools like get_agent_status or enlist_agent without opening a 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?

Explicitly instructs the agent to re-run immediately after posting the oath comment or starring the repo 'instead of waiting', which is concrete when-to-use guidance. It does not name a sibling alternative or an exclusion case, so it falls short of a full 5.

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