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

Annotations only declare readOnlyHint=false and destructiveHint=false, and the description goes beyond them by naming the role requirements and the self-vs-others authorization distinction, which is meaningful for a mutation call. It stops short of stating reversibility or what the response contains, but an agent knows resolve can be undone via resolved=false from the same text.

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?

Two tight clauses with the action front-loaded and permissions in a parenthetical; no filler. The density of the parenthetical makes it slightly harder to scan, but nothing is redundant.

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 small mutation tool with no output schema and 0% schema coverage, the authorization details are good but the identifier parameters remain unexplained and there is no indication of what happens to replies in a resolved thread or what is returned.

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 0%, so the description must carry the parameters and it only covers one: it correctly explains that 'resolved' defaults to true and can be used to reopen. 'id' and 'threadId' are left completely undefined in both schema and description, leaving the agent to guess whether 'id' is a document, artifact, or file identifier.

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 (resolve/reopen) plus the resource (comment thread), which is unambiguous. It does not name or contrast the neighboring tools comments_list or comments_reply, so sibling differentiation comes from the tool name rather than the description.

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?

Permission conditions ('needs comment role or higher', 'own threads vs. someone else's needs edit or owner') give real usage context, but there is no explicit when-to-use/when-not or pointer to an alternative tool for thread handling.

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