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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is fully covered. The description adds that PITR availability is returned, which is useful content context, but says nothing about permissions, scoping, or pagination beyond what annotations give.

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 front-loaded sentence covering the resource and the notable return content, with no wasted words. It is efficient, though arguably under-developed rather than over-long.

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 list tool with annotation coverage and no output schema, the description adequately signals what is returned. The unresolved gap is the 8 undocumented parameters with one required field that the description never clarifies.

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 0% across 8 parameters, so the description carries the full burden and does not compensate at all. It never mentions project_ref (the only required parameter) or explains the beon_* plumbing parameters, leaving the agent to guess at required inputs from the schema alone.

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?

Specific verb (List) plus resource (database backup metadata and PITR availability), so an agent knows exactly what comes back. It does not, however, name or distinguish itself from near siblings like railway_list_volume_backups or supabase_restore_backup/supabase_restore_pitr, so sibling differentiation is left to the 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?

There is no when-to-use or when-not guidance, no mention of prerequisites, and no routing to the restore tools that a backup listing naturally precedes. The agent must infer that this is the read step before supabase_restore_backup or supabase_restore_pitr.

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