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

Annotations cover the safety profile (not destructive, idempotent), and the description adds genuine context beyond them: the resulting state (backlog), the UI analogue (docket's reopen button), and the side effect of notifying followers. It does not say what happens when the ticket is not closed or what errors/permissions apply, so it stops short of 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?

A single sentence, front-loaded with the verb and precondition, and every clause earns its place by adding state outcome, behavioural analogy, or side effect.

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 one-parameter state-transition tool with annotations and full schema coverage, this is nearly sufficient: outcome state and notification side effect are disclosed. The only gap is behaviour on invalid input (ticket not closed, unknown id), which the description doesn't cover and no output schema explains.

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% and the single parameter carries its own provenance hint ('From search_tickets'), so the schema does the work. The description adds nothing about the identifier format. Baseline 3 applies.

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?

Specific verb+resource ('Reopens a closed ticket') with the resulting state named (back to the board's backlog), which distinguishes it cleanly from close_ticket and reschedule_ticket. An agent knows exactly what state transition occurs.

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 precondition 'closed ticket' is implied by the description, which is useful, but there is no explicit when-to-use guidance or mention of alternatives (close_ticket, update_ticket-style siblings don't exist, but reschedule_ticket is adjacent). Usage is inferable rather than stated.

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