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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered elsewhere. The description's contribution is the payload expectation — steps and copy — which is genuinely useful. It says nothing about what happens when the id is unknown or the version does not exist.

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?

One sentence, front-loaded with the return behavior, with the optional-version clause placed last where it belongs. No filler.

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?

There is no output schema, so the description carries the burden of describing the return value, and it only gestures at "steps and copy" without indicating structure or shape for the nested payload. For a read tool with fully covered annotations this is adequate, but not complete.

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 compensate: it explains that the tool returns a single sequence (implying the required `id`) and that `version` is an optional narrowing selector. It does not clarify version semantics such as whether omitting it returns the latest, which is the key ambiguity for this parameter.

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 ("Returns") plus a precise resource ("one saved message sequence") and what it contains ("its steps and copy"). An agent can distinguish this from listSequenceTemplates by the singular scope, though that sibling is never named.

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?

No explicit when-to-use or when-not guidance. The word "optionally" hints that the version parameter is discretionary, but nothing tells the agent to prefer this over listSequenceTemplates, getCampaignSequence, or archiveSequenceTemplate-style siblings.

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