Diff Discord Backups

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and closed-world scope, so the safety profile is fully covered elsewhere. The description adds some scope information by narrowing the comparison to roles and channels, but says nothing about diff direction (added vs. removed) or what happens on mismatched or missing backups. Given the annotation coverage, a 3 is appropriate.

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 operation and scoped to the two resources compared. No filler and no redundancy with the title.

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 only two required string params, full schema coverage, and an output schema to carry return values, the description is nearly sufficient. The only gap is operational context an agent would want — whether snapshots must come from the same guild and how unavailable IDs are handled.

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% — both beforeBackupId and afterBackupId are documented as 'Older or source' and 'Newer or target'. The description adds nothing beyond that, which is the baseline 3 case where the schema carries the parameter burden.

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 verb 'compare' plus the resources 'roles and channels' and the scope 'two stored backup snapshots' are all stated, which separates it from the create/list/read/restore siblings in the backup family. It stops short of naming an explicit alternative, but the operation is unmistakable.

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?

Usage is only implied: the tool compares two stored snapshots, so an agent can infer it belongs before a restore or audit. The description never states when to pick this instead of discord_backup_restore_plan or discord_backup_read, nor any preconditions such as both backups belonging to the same guild.

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