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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered and the description carries a lower burden. It adds the useful semantic that the rows represent publish history, but says nothing about ordering, how many versions are returned, or whether the live version is guaranteed to be present.

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 clause with zero wasted words and the key scope front-loaded. It is efficient but so compressed that it reads more like a section label than a usable definition.

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 read-only listing tool with five all-optional parameters, full schema coverage, and no output schema, the description covers the essential identity of the resource. The remaining gap is what a returned 'version' row contains, which matters for choosing between summary and full.

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 100%, including detailed enum guidance for 'detail' and container/workspace defaults, so the schema does the heavy lifting and a 3 is the baseline. The description adds no meaning beyond the schema, such as what 'full' returns for a version or what happens when no container is supplied.

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 names a specific resource and scope: the live container version plus recent versions framed as publish history. That is enough to tell it apart from gtm_publish, gtm_pending_changes and gtm_audit, but it is a bare noun phrase with no verb and no explicit sibling routing.

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?

There is no when-to-use guidance, no exclusions and no naming of alternatives such as gtm_containers or gtm_pending_changes. The parenthetical '(publish history)' only hints at the use case; the agent must infer that this is the tool for 'what did we publish recently'.

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