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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description adds nothing beyond that: it does not say the deletion is permanent, whether dependent snapshots are affected, or what permissions are needed. With annotations carrying the load, this is a thin but non-contradictory description.

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 short, front-loaded sentence with no filler or redundancy. It is efficiently written, though its brevity borders on under-specification rather than optimal density.

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?

An output schema exists and annotations fully describe destructiveness and idempotency, so much of the behavioral burden is handled elsewhere. Still, for a destructive operation the description should at minimum state that the action is irreversible; that omission leaves a real gap given the tool's risk profile.

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%, with the single `id` parameter documented as "ID of the resource to delete," so the schema already does the work. The description only echoes the "by ID" lookup and adds no format, source, or validation detail. Baseline 3 applies when the schema carries full parameter meaning.

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 gives a specific verb and resource ("Deletes a backup") plus the lookup key ("by ID"), so an agent knows exactly what the operation targets. It does not differentiate from related siblings such as delete_snapshot or delete_volume, which is the only thing keeping it below a 5.

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 guidance on when to delete a backup versus restoring it (restore_backup) or taking a new one (create_backup), and no note about preconditions or irreversibility. The agent must infer all usage context from the name alone.

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