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

Beyond the read-only, idempotent, and non-destructive annotations, it discloses the stored-artifact scope, accessibility constraint, comparison categories, and the important limitation that missing guardrails/parameters remain unknown. The explicit statement that it never rolls back or deploys is consistent with the annotations and clarifies the absence of operational side effects.

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?

Three compact sentences front-load the operation and scope, then provide comparison details, a limitation, and a side-effect boundary. Every clause contributes useful selection or invocation information without repetition.

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?

Together with the safety annotations and output schema, the description supplies the essential scope, comparison content, and interpretation caveat needed to use the tool. The remaining gaps are operational: discovering valid versions and understanding when platform should be supplied are left to inference.

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?

With 0% schema description coverage, the description partially compensates by establishing that the versions are stored artifacts and must belong to the same accessible agent/platform. However, it does not explain baseline/target semantics for from_version and to_version, how to discover valid version integers, or how agent_id interacts with the optional platform 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?

The description precisely states that the tool compares two stored artifact versions of the same accessible agent/platform and identifies instruction diffs and skill additions/removals as the comparison content. Explicitly excluding rollback and deployment also distinguishes it from action-oriented siblings such as deploy_agent.

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 scope makes it clear to use this for a version-to-version artifact diff, while 'Never rolls back or deploys' supplies a useful when-not boundary. It does not name alternatives for deployment, rollback, or single-version inspection, or provide prerequisites for finding valid versions.

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