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

Annotations declare readOnlyHint=false and destructiveHint=true, and the description usefully discloses the state changes behind each flag: live:true closes the thread as won, live:false drops the question, noLinkBackOwed clears the owed flag and closes as won. It doesn't clarify what 'drops the question' means concretely (deleted vs archived) or whether the action is reversible, which keeps it at a 4 rather than a 5.

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 primary instruction is front-loaded and there is little redundancy, but the third sentence on noLinkBackOwed is heavy with dashes and asides ('instead of live', 'a paid placement, a free mention') that slightly dilute scannability. Every sentence still carries actionable content.

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 carries the return burden and it covers outcomes (thread closed as won, question dropped) and preconditions well. Minor gaps remain: no note on error behavior if the conversationId is stale, and no explicit differentiation from mark_deal for the same won-deal state.

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 coverage is 100%, so the baseline is 3, but the description adds consequence-level meaning the schema lacks: live maps to closing-as-won vs dropping the question, and noLinkBackOwed is explicitly for non-swap placements (paid placement, free mention). This goes beyond the terse schema strings ('true if the link is on the page').

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 and resource: answering the checker's question about an unreadable page, keyed by a conversationId. It also names the exact place the ID comes from ('could not read' section of list_links), so the agent can distinguish this from the list_links read itself.

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?

It gives clear preconditions: only answer after a person has actually looked at the page, never from a guess, and only when the person or thread says so. It also routes the noLinkBackOwed case for non-swap placements. It does not name a sibling alternative (e.g., mark_deal) for the won-deal outcome even though that sibling exists, so it stops short of full alternative routing.

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