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

Annotations already declare destructiveHint=true, readOnlyHint=false and idempotentHint=false, so the write/side-effect profile is covered. The description adds real context beyond that: the answer is injected into the escalating agent as if from a human, and a valid account token is mandatory to prove a human is answering. It does not, however, say what happens on repeat calls or when the escalation is not open.

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 front-loaded sentences that carry the key action followed by the authentication rationale. Slightly redundant in restating the token requirement in both a parenthetical and the closing clause, but there is no padding.

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 4-parameter, non-idempotent mutation with no output schema, the essentials (effect, delivery target, auth requirement) are present. Still missing are failure modes — invalid/already-closed escalation id, token rejection, repeat-answer behavior — and the meaning of `resolved_by`, which an agent would need to supply a correct call.

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 only 25% (just the `token` description), so the description must compensate. It partly does — it reinforces the token's authentication role and explains what `answer` does once delivered — but `id` (which escalation) and `resolved_by` remain entirely undocumented in both schema and description.

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 and resource ('Answer an open escalation') plus the consequence ('the answer is delivered to the escalating agent'), which cleanly separates it from the sibling `escalate` (which raises one) and `list_escalations` (which reads them). An agent knows exactly what this tool does without opening the 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?

Usage is only implied: the tool applies to an escalation that is already open and requires a human-authored answer. There is no explicit when-not guidance (e.g., what to do if the escalation is already resolved or belongs to another team) and no named alternative such as `escalate` or `ack_coordination`.

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