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

Adds substantial context beyond the destructiveHint/readOnlyHint annotations: the post-release state ('not offered for new work'), the irreversibility, and the exact date-resolution behavior when releaseDT is omitted. This tells the agent what actually changes and what cannot be undone.

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?

Front-loads the core action and effects, with the irreversibility/explicit-request caveat last where it belongs. It is dense but every clause carries information; only mild run-on structure keeps it from a 5.

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 usefully notes the response contains the resulting releaseDT, and it covers side effects and irreversibility. Combined with full schema coverage and annotations, the agent has enough to call it correctly, though a brief nod to prerequisites/auth would make it 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 coverage is 100% (baseline 3), but the description adds real meaning: it explains that omitting releaseDT preserves the existing/planned date or defaults to today, and that isPublished also publishes. This goes beyond the terse schema descriptions.

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+resource ('Releases a version') and adds the resulting state change ('marks it completed...not offered for new work'), which distinguishes the effect from a generic version_update. It does not explicitly name version_update as the alternative, so it falls short of full sibling differentiation.

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?

Gives a clear usage constraint — 'only at the user's explicit request' — and flags irreversibility. It does not explicitly contrast with version_update or state a when-not condition, so it stops short of naming alternatives.

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